I think that's a pretty big leap to make. ANYONE posting here (on any part of the forum) could have been the victim of abuse, and they may handle relationships poorly because of it or buy designer items to compensate or dress a certain way in response to it or want to change their appearance in one way or another. What I'm saying is that there is no reason to suspect from what the OP said that abuse factors into this at all.
And, surprisingly, when I looked this procedure up I found blog postings indicating that apparently many men DO care about appearances in that arena. And many women have had unwelcomed comments made regarding things. So I suppose combined with some of the physical discomfort other posters have described (which I never realized might be a possibility, either), someone's appearance in that area might make them uncomfortable in a number of ways. At the very least, many swimwear bottoms are pretty tight in that area, making it difficult at best to hide any junk in that particular trunk.
I guess I just view this the same way I view many other plastic surgeries. I don't think a person needs to be psychologically damaged to consider this, nor do I think it is any weirder than many other cosmetic procedures. Again, these kinds of surgeries aren't for me, but that doesn't mean others are wrong or unusual for considering or going through with them.