New item: Liquid Virgin

This pull request adds a new item called liquid virgin. Liquid virgin restores your vaginal (preferably) or anal virginity. It also encourages you to lose it again by increasing corruption and possibly putting you into heat or rut.

Currently, it can be bought from Giacomo or dropped by imps, satyrs, or the demon pack. I'm not attached to these particular sources, so if you have better suggestions I'm happy to change them. (I'm not attached to the name, either—it's a little more direct than most CoC item names.)