I was just gonna post here
. Anyway, we all have stretch marks. I'm a skinny guy and I have stretchmarks (in my case, from a growth spurt). I seriously doubt that anybody is without stretchmarks (unless they have a professional airbrusher following their every step).
I don't think they're ugly either, they're just more body markings. Looks like a zebra effect to me.
I like this line from an Ani DiFranco song, "I've got highways for stretchmarks, see where I've grown".