If they were very attractive to you. Example below.
Most Helpful Guy
That's rude of your ex! Stretch marks happen, grow up. Seriously, he's going to be disappointed later in life, lol. They don't really have anything to do with sexiness, or dating. The girl I'm with (who is AMAZING in bed!!!) has a few, but I really don't care. I think it's far more important to attempt to stay healthy. Imho.1
Most Helpful Girl
Your ex is a horrible person. Unless someone has extreme stretch marks, like super extreme I can't imagine anyone being significantly turned off by them. And for him to announce it shows how vicious he was. He wanted to hurt you and make you insecure.
I am white af so mine aren't as visible but I have very white thin stretch marks on the sides of my ass. They used to be red. I was embarrassed at first but honestly the majority of women have them, and if you have an ass of any sort it's to be expected. Nothing to be ashamed of. I don't think they're ugly at all. I've never heard a guy express disgust with stretch marks.1