Over the past 7 or 8 years I have received anal penetration from several of my wife's bulls and I receive anal regularly from our live in boyfriend. I have enjoyed this activity and will usually ask for it. However, my questions is: I seldom can maintain a full erection while I am being fucked anally regardless of the position or how hard or turned-on I am before being penetrated. I still enjoy it immensely but my erection seems to go away during the act. I have watched numerous porn shots and it appears most the guys also do not have an erection during anal penetration. I was wondering if other guys on this forum have found this to be the same for them or if it is something only I seem to experience.