An ass is an ass, the issue is introducing unsterile things into your ass. The way Anna is doing things really is dangerous. She a risking an awful lot for such little pleasure. Normally girls do things to give pleasure to their boyfriends, in this case it seems that she is doing it in her own and Alex is just helping her. Especially since Alex seems so nonchalant about it. I've come to the conclusion that she plans to do BDSM porn and this is just practice. If she keeps this up, she'll be wearing a diaper by the time she's 40, if not sooner.