So I was gettin it with this girl last week and didn't have a condom, so i had to use one her roommate had. i'm a bit over 6" around and it was a normal-sized durex. Now, I'm young and virile, and haven't ever had this problem when using magnums, but I went flaccid on 2 occasions that night while fucking her. I've always been attracted to her, and she definitely knew how to work it. Could the toot tight condom have reduced the blood flow to my cock, making me flaccid?