I, too, have never dabbled in the party scene and for a number of reasons.
The main ones, I guess, are that I never considered myself to be well-endowed, not that I've ever really been in a position to make comparisons. And that, when it comes to any kind of sporting activity, my disability has almost always meant I was more of a spectator than a 'playya'!
There's part of me wishes I'd attended at least one party; but Sod's Law predicts that if I'd dipped my toe in that particular pool, I'd have gone to one where, because some of the booked girls didn't turn up, there'd be a poor ratio.
Now that I'm in the autumn of my years - both actual and punting - I've come to the conclusion that, if I haven't done it by now, I never will. Besides, I'm so fluffy in the room in a 1-2-1, that I, too, almost certainly wouldn't be assertive enough in a party environment.
Ah well, c'est la vie, as they say across the Channel!