Got to agree, there's some terribly ageist, classist, judgemental comments on this thread.
For instance, so what if a young woman has a few pimples on her bum??? I've got a few on my face, should I not show it in public? Honestly, what a horrible comment to make.
I have never worn a bikini due to my own body hang ups, but I really admire women who don't give a shit about looking perfect and wear one anyway, I wish I had their confidence.
Unfortunately, as this thread shows, there are still plenty of other women sitting around the pool/beach judging them for it. I find it sad.
OP, I think you should wear it if you want to wear it. Honestly, you won't be the only one. It sounds like a lot of the people judging you on this thread haven't actually been on holiday for a few years, because thong bikinis are everywhere now. Fuck what your son thinks, he'll get over it. My mum used to go topless on holiday. Yes, I was embarrassed, but everything she did at that age embarrassed me, and, in retrospect, good for her for just doing what she wanted.
And to the posters who say that you need a small bum, no, the whole point is that big bums are beautiful these days, it's not the 80s anymore.