"As for the rest of the story, I can't speak to the veracity of it, but I find it hard to believe there was any blood drawn as the result of his length and/or thrusting. "
I can say that from personal experience, it does happen. We were with a couple once and Ken (my husband who is over 8" long) had that happen to him. The woman's husband had a really thick 4 or 5 inch dick and he mentioned that it sometimes happens when she is with well endowed men. I've also had that happen to me with a guy who was 10".
If you haven't had it happen to you, consider yourself lucky. It took me a week to get over it, and a week without sex makes me really cranky.