Consult the official fantasy refrence (Terry Pratchett) who says something along the lines of:
The majority of the dwarfen mating ritual consists of trying to find out what sex the dwarf under their beard is.
Quotes:
All dwarfs have beards and wear up to twelve layers of clothing. Gender is more or less optional.
-- (Terry Pratchett, Guards! Guards!)
All dwarfs are by nature dutiful, serious, literate, obedient and thoughtful people whose only minor failing is a tendency, after one drink, to rush at enemies screaming "Arrrrrrgh!" and axing their legs off at the knee.
-- (Terry Pratchett, Guards! Guards!)
And now some dwarf poetry:
Gold, gold, gold, gold,
gold, gold, gold, gold,
gold, gold, gold, gold,
gold, gold, gold, gold.
Gold, gold, gold, gold,
gold, gold, gold, gold,
gold, gold, gold, gold,
gold, gold, gold, gold.