Imagine this, you and a group of friends meet up with a fit female (me). She's in a skirt, nothing underneath. She drops to all fours pulling her skirt up. She takes a funnel and inserts it into her back side giving a nice view within. Then you and your friends have fun talking turns blasting your loads into the funnel filling her nicely making sure every drop goes into her. Once you've been drained you take turns letting her use her mouth to suck you clean. Adventurous? After you've been drained, empty your bladders into the funnel too. Once you're done she'll pull the funnel out, pull her skirt back down, and leave with a nicely filled backside.