its a pain in the arse, if you have a 18years old beautiful daughter that is allready premature. During showering and accidently she discovered that she is highly sensible inside her tumb and started to insert different kind of objects in her young virgin anus. While she was slighty rubbing her clit it turned out, that this teenage beauty was just more exicited thru butt penetration then classic vaginal penetration and helped out herself now discovering this strange but sexy anal masturbation technique. Her next lover will be probably shocked if that young girl ask him to do the same with his penis