You're probably right. I remember years ago, when larger sized condoms first started to be advertised, a group of us in the office were discussing this, and how men might buy them because of vanity, etc.

It was a single woman in the group who made some joke to the effect:

I can just see this guy dropping his wallet in a bar next to some woman. As he is picking it up, he says something like "Oh! I'm so embarassed! My Megolomaximus XL condom seems to have slipped out."

I always wondered if that was a stab at men, or if she really wanted to be part of that scene...