Slightly different situation, but one that made me quite embarrassed. I had enjoyed a few dates with a woman, but since the chemistry wasn't quite right, we hadn't had sex. She invites me to a party at some friend's house and even though I am total stranger to everyone, we have a decent enough time. People are dancing, some are swimming, etc.
By now it's late and only a few couples are left, most are quite tipsy. The hostess then invites those of us remaining if we'd like to jump in the hot tub and several couples say sure. As you can imagine, I start to feel uncomfortable because I'm getting a vibe I don't like. My date then says "sure, we'll get in the tub but we don't have any swim suits." Naturally, the hostess says something like "Don't worry... at our place you won't need a suit!" By now, I'm thinking I've got to get out of her, but my date is flat-out insisting. By the time we're by the pool, most of the couples are out of their clothes and either in the tub or sitting on the edge. (A bunch of very normal-sized guys, by the way.) In a second, my date is out of her cocktail dress and her underwear and in the tub, "Saying, come on Ben, get in here you chicken." So, what the hell. I strip, hang my clothes over the pool furniture and come to the hot tub... now displaying a penis that has been described as "a cucumber." Well, the tone of the party suddenly changes, as wives blurt to their husbands, "Look at that thing," and men are muttering "Give me a break." I walked into the pool like nothing was happening and frankly, I wanted to stay there but the water was so DAMN HOT that I just had to get out an sit on the edge like most everyone else. Good gosh, it was awkward -- seven strangers, all of whom are staring at me, obviously uncomfortable and my date, now VERY friendly, saying something like "Oh my, Ben, you have NOTHING to be shy about!" Dead silence. It's less than a minute later before one of the other men says, "That's enough of this. Let's go, Susan," basically ordering his wife get dressed. Suddenly, everybody decides the party is over. My date isn't really happy about the party breaking up but I can't get dressed fast enough. Goodbyes are curt, like I did something uncouth to ruin their party.
Now, many of you may think that I shouldn't have been the least bit embarrassed and perhaps other differing circumstances I wouldn't, but right then and there I felt like an out-of-place freak... even though at the time I was in my late twenties, hung and plenty proud. It was the kind of night that even though my date then invited me into her place, it was now almost three in the morning so I just called it a night. It was a bummer, let me tell you.