Can i have sex with a butterfly while kneeling in a cottonwood tree at the end of my driveway whilst making funny faces at traffic?
lol Sex with a butterfly? Sounds kinda hard to do, if you ask me. Best make sure her Madre isn't driving by when you do all of that!
unless you leak out of her ass and semen drips to her lips it won't happen. even then it would be hard.
Find a picture of a womans anatomy. There is no link from one area (arse) to where babies are concieved.
Its called splash conception, it can only happen if some cum leaks into her pussy. Even then it would have to somehow reach the cervix, so quite unlikely.