I have been pestering my girl friend for anal sex she agreed on one condition, her words were an arsehole for an arsehole, first she wanted to tie me up and fuck me up the arse with a strap on dildo, after I could do to what ever I liked, has any man out there tried it I am sure there is.
Catson
A strap on in the ass is great. Make sure you lube, even do poppers to make it more relaxed. My GF puts on a strap on regularly for me, I tend to wear a short dress, bend over and she goes for it.
If your girlfriends wants to fuck your anus, let her! It might open other doors for the two of you in terms of other sexual activities. My wife fucks my anus with an 8" long strap-on and it is very hot for both of us.