Inter-species Relationships
Humans
Many humans have an attitude of 'will try anything once', and among the vast diversity of humans you will find at least one with a fetish for almost anything. Whilst most humans look down on those who couple outside the species, there are nevertheless a considerable number of secret or open relationships with others. Given the fertility of humans, they are represented in a large number of cross-breeds.
Elves
Elves tend to look down on the other races, and rarely consider them as viable sex partners. Those that do are often viewed as demeaning themselves, but despite this young elves sometimes 'slum it' with other races, and human/elf pairings are far from unheard of. Some elven priests and arcanists have established intimate relationships with Celestials, there is no stigma attached to such a relationship and indeed it is considerable admirable. Due to their low fertility elven cross-breeds tend to be rare, although the number of half-elves indicates that human fertility is enough to compensate for this.
Dwarves
Dwarves are very conservative sexually and almost never have sex except with their life-partner, leave alone those of other species. Those who do however are not discriminated against, though their unions are never blessed with children.
Halflings
Halflings are sexually curious, but rarely explore far from familiar ground. Those who do however are frequently famous for their perversity and willingness to try anything they are likely to survive.
Halfbreeds
Half-elves and half-orcs tend to identify with the mores of the race they were brought up in, though their obvious ancestry tends to encourage them to greater diversity. Half-elves in particular are famous lovers of anything that stands still long enough. Since half-orcs usually have non-traditionally handsome looks they are often willing to look further afield to find a willing partner.
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Celestials
Celestials always mate for love, although Eladrin can be rather impulsive about who they love. The soul is everything, and they are unconcerned about the physical form their lover wears. If they are physically unable to couple with them they either obtain shapechanging magic, or form a platonic relationship. As Outsiders Celestials can crossbreed with nearly anything, although fertility tends to be low. The child takes the form of the other parent, altered by the power of the Heavens.
Fiends
The opposite of Celestials, Fiends view sex as a way of inflicting suffering and humiliation on others. Black-hearted mortals sometimes willingly couple with fiends either to engage in the foulest perversions or to conceive a child of great power, but the greatest horrors are for those unfortunates who are captured. Fiends rarely change their shape, they enjoy the pain and horror their form inflicts on their partner. The exception to these general rules are the Succubi and Erinyes, who often take the shapes of comely mortals to tempt and corrupt the forces of good, or to satisfy the desires of evil summoners. Like Celestials Fiends can crossbreed with anything, the child being similar to the other parent but corrupted by darkness.
Dragons
Dragons usually mate with their own kind but there are exceptions. Some dragons enjoy diversity and experimenting with different partners, and use their shapechanging magic to assist. Others, particularly red dragons, seek to breed an army of half-breed children to serve them. Still others fall in love with a member of another species. Some dragons can inherently shapeship, and most others learn Polymorph as a sorcerer spell, but due to the short duration and 'unnatural' feeling of the form many prefer to couple in their natural form if size permits. Dragons are normally extremely infertile, but for unknown reasons when mating with another species they nearly always conceive if no precautions are taken. Draconic mothers lay an egg as normal which hatches into a half-dragon, which if expecting to be suckled may require the dragon to procure a wet-nurse. Mothers of other species give birth (or lay eggs) as normal for their species, allthough the greater size of a half-dragon may complicate delivery. Some sages assert that the other races are in fact the distant descendants of ancient draconic coupling with animals, but few take them seriously.
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Druids
The Druidic ability to wildshape obviously leave them open to sexual contact with the animals in their area, with which they have formed a close bond. Some druids see this as simple bestiality, and avoid it. Others see it as a way to get further in tune with nature, and to relieve pressures built up with too long away from other humans. Still others attempt to build up the numbers of a species in local decline, although a single person is seldom enough to make much difference. It is an individual choice, and druids view it as private and not to be discussed. Since the animal form mimics the condition of the druid, and humans are in perpetual oestrus, a female druid will always appear 'in season' and if not desiring a liason will have to deter potential suitors. Unlike Polymorph a druid becomes a true example of the species and is capable of becoming pregnant or impregnating his partner - the resulting offspring will be an animal of the appropriate type and unusual intelligence (although not sentient). Female druids can shapeshift normally until the last month of their pregnancy (which has a gestation period equal to that of the animal), whereupon they must stay in the appropriate form until the child is born.
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Shapechange
The longer duration and the ability to take any form you can imagine make this spell a favourite among powerful arcanists looking for sexual variety. Popular uses for this spell include coupling with those it would normally be biologically impossible to have sex with, and to simulate interspecies sex without needing to leave the established relationship. Because seperated parts do not revert in form anything sired by a user of this spell will have a biological father of the form the father was in, rather than the arcanist. Two humans could potentially have half-dragon children. This also allows female casters to father children.
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Blessing of Fertility
Transmutation
Level: Fertility 6
Components: V, S, DF
Casting Time: 1 minute
Range: Touch
Targets: 2 willing corporeal creatures of different genders
Duration: 1 month
Saving throw: Will negates (harmless)
Spell resistance: Yes (harmless)
This spell effects two willing creatures such that they are fertile with each other, creating halfbreed offspring. The spell lasts one month during which the female partner must become pregnant, if the two creatures are not normally able to couple with each other additional magic must be used. The child will combine features of the two parents, possibly becoming a monstrous humanoid, a tauric creature (see Savage Species), or something stranger. If there is an existing creature type combining the two parents (such as a centaur for human and equine) the child is one of them, otherwise it will be something new. The nature of the offspring will always be such that the mother can carry and deliver it without harm, although it may undergo rapid growth once born to reach its proper size. The child matures at a normal rate and will breed true, potentially creating a new species. The fertility of the affected couple is equal to that of the more fertile partner.
The effect of this spell can be duplicated with a Limited Wish, Wish or Miracle, although only certain gods would grant it as a Miracle.