aren't those creature suppose to eat their prey soul after dragging it with lust?

they're depicted differently. in yaoi they mostly just need to receive semen in order to be fed. like a vampire but instead if bleed they just need semen

wait, so if he wanks and gets the needed semen? or should it someone else's?

well i mean its gotta be someone else's, incubuses arent self feeding lol.. like karpio said, incubuses in yaoi are depicted differently, theyre basically sluts.. all for the sex scenes

interesting, thx for the info