Well, if Machine's example is enough, I've been in all my exes asses.
I did high-speed, dry anal entry with the ex-wife (total accident, I was vigorously slamming her, came out, and went back in through the exit door - for which I was shrieked at for a couple of minutes). That was all 6.5 that time (hey, stfu), but I don't count it. Finally in life I have the green light on the browneye with my current lady, but I haven't taken her up on it yet (I know, I can't believe it either... before I get too much older).