The prompts used were size kink and innocence (also combined with a prompt from fic-promptly@DW).
Rite of Passage (on Livejournal or AO3)
Fandom: DCU (Batman)
Characters: Bruce Wayne, Damian Wayne
Pairing(s): Bruce Wayne/Damian Wayne
Warning(s): age difference, incest (father/son), sex pollen, underage
Summary: Damian has an unfortunate encounter with Poison Ivy. Luckily for him, Bruce knows what to do.