I have stretch marks on my arms and on the sides of my waist and I'm a 26-year-old man. I was really fat as a kid and lost a ton of weight by simple alorie restriction - a lot easier to do when you're very young. They've faded to skin colour and they really don't bother me and have not seemed to bother my partners during intimate moments either.

I look at them as battle scars and something to be proud of. When you're in tip-top shape, I don't think you'll give them a second thought. When you're little a heavy minor things tend to play on your mind than they should.