beholder= jars of captured eyes
illithid- jars of captured brains, or brains of enemies that were worthy and died in combat
demons and ilk: a flesh golem with troll and doppleganger qualities and completely subservient. (demons and ilk like to torture, and since the construct regens, they don't care what form it takes. it would be funny if the golem was in the form of a pc when they defeat the demon and they try to reason with the construct who just obeys hehehe)
Mainly take what you think that the creatures would like or hold in amorous regard.
Most likely these are things that are not remotely close to human/humanoid perceptions of beauty in any case.
illithid- jars of captured brains, or brains of enemies that were worthy and died in combat
demons and ilk: a flesh golem with troll and doppleganger qualities and completely subservient. (demons and ilk like to torture, and since the construct regens, they don't care what form it takes. it would be funny if the golem was in the form of a pc when they defeat the demon and they try to reason with the construct who just obeys hehehe)
Mainly take what you think that the creatures would like or hold in amorous regard.
Most likely these are things that are not remotely close to human/humanoid perceptions of beauty in any case.