From the realm of I Kid You Not:
Accidental anal intercourse: does it really happen?
"A postal survey was conducted of members of the Association of Forensic Physicians (UK) to determine whether accidental anal intercourse occurs in heterosexual relationships and, if so, whether intoxication by alcohol or drugs and sexual inexperience were likely to be causative factors. Of the 512 (47.9%) replies, there were 498 individuals who had had a previous heterosexual relationship and may have experienced accidental anal intercourse. Of these, there were 26 (7.2%) males and 14 (10.4%) females who reported at least one lifetime episode of accidental anal intercourse. Amongst those with a history of accidental anal intercourse, 79% reported that they were sexually experienced at the time and 83% reported that their partners were sexually experienced. Personal intoxication by alcohol or drugs at the time of accidental anal intercourse was reported by 43%, with 41% reporting that their partners were intoxicated."
http://www.ncbirofl.com/2009/08/accidental-anal-intercourse-does-it.html
http://www.ncbi.nlm.nih.gov/pubmed/15763681
The best part?This is the kind of ...incident that is typically under-reported.In other words,these are the guys who admitted it!I wonder how many didn't.Or wouldn't....Obviously,more research is indicated>:)
Via Ryan Sager.