This doesn't really count as a disadvantage, and it's not very eventful, just a guy I got the impression he was resentful of me because he heard I was hung:
This chick I was previously dating (she was sexy as hell (not relevant, just wanted to say))
Before we started hooking up, we were talking and texting for a while. Once we got comfortable with each other, and horny, I sent her a few pics and vids of my penis. She reacted really positively towards it.
Every time we had sex, I guess she was really tense at first, because I couldn't fit it in. I'd grind the head around for a minute, she'd get really wet, and I'd slide it right in. She always made this sexy little gasp when I fully entered her.
She had an older sister, who was married. The brother in law, I had met a few times. He was short in stature, worked in finance, he was really materialistic, into having nice clothes, expensive things, vehicles (make of that what you will). He was also a bit of a know it all. He seemed to be really unhappy. Every time they came home to stay with my girl's family, he would get ripped drunk and do something foolish. Once he fell and hit his head, the other time, he was playing with a kid's RAZOR scooter, and fell off into the grass. Both times, he complained all hard about being in pain, and went to the Urgent Care to get a prescription for pain. I asked the sister if she thought he may have been showing drug seeking behavior, she got really pissed and short with me, so I dropped it.
One night, my girl was out on the back porch drinking with two of her friends from college. Somehow the subject of my own is came up, and she was telling them how surprised she was when I sent her a pic, and how shocked she always was when I put it in. She showed them one of the vids I had sent her.
The brother in law at this point was drunk on vodka, and probably what seemed like Xanax. He had been belligerent and obviously had no inhibitions whatsoever. Somehow, he overheard her talking about my penis. She told me he got really weird and seemed to fixate on it.
He asked her how big in inches does she think it is, he asked her to show him with her hands, he asked her twice to show him the picture but she didn't feel comfortable, "How thick is it, because sometimes guys can be really long, but thin.",
The next night, he got wasted again, and came back to the same subject, "Is that the guy with the big dick you're texting?" "It's not too big is it? Some guys can be too big, and it can be painful. They say it's most pleasurable for a girl when it's about 5 to 6 inches..." "What's the biggest you've ever been with?" The older sister, his wife, told her that he had asked her if my girl had told her about it.
I'm not that big, but sometimes girls can overexaggerate, so I think he got the impression from her that I was huge.
Maybe it was just in my head, but after that, every time I was around him, I felt like he was envious or resentful towards me. Maybe he had a small penis, or maybe he just really wanted to bang the younger sister, but he always seemed to be undermining me, correcting me, competitive towards me, like bragging that he was beating me in pool (which I'm not good at), bragging about his sexual technique one night, any story I had he had to top it with a better story (you know the type), giving me life lessons or advice.
I felt kinda weird about it, I don't ever want to make another guy feel inadequate, and he probably woulda felt better if he saw I wasn't THAT big anyways, but I couldn't help but feel he was resentful towards me