Why didn't you use the damn search feature on this site before asking such a retarded question. This question has been asked on here more times than I've taken a sh*t in my entire life probably. I don't give a damn about stretch marks, and every other guy I've ever known, with only one exception, was the same.
Nah that is not a determining factor for me. Not even close. Don't let stretch marks make you uncomfortable about yourself. Most guys are not gonna care, I know I dont. And if they are that petty you shouldn't worry about them anyway.