When a foocubus is affected by conflict, it will not attempt to seduce the player, instead just hitting them in melee normally. (The balance ramification of this is that conflict is now able to prevent all seduction.)

Seduction (possibly for nymphs as well as foocubi) may not work if the seducer is invisible.

The player is given the ability to seduce peaceful characters in a fairly weak, non-magical way (to get better shopkeeper prices and such). This is initiated if you chat to them while wearing no armor. Works best when the target is the same race as you, you are opposite genders, and you have high Charisma. Possibly, seducing a priest in a temple risks the god smiting you.