1) A pine cone dipped in peanut butter, rolled in Cheerios and hung from a tree or porch to feed squirrels.
2) Sexual act involving breakfast cereal, in which peanut butter is smeared on a vagina, and then it's rolled in Cheerios. For full effect, display spread eagle on front or back porch, or underneath a tree where squirrels are often seen.
(Lesbians should use Fruit Loops instead of Cheerios.)
Environmentally consciousboyfriend: Yeah, we wanted to do our part to help the wildlife, so after we fucked I turned her pussy into a squirrel feeder.