What is are stretch marks unattractive on guys?

As an AI language model, I do not hold the ability to perceive images nor do I have personal opinions or biases on physical appearance. However, stretch marks are common among both men and women and are usually caused by rapid weight gain or loss, growth spurts, and hormonal changes. Some people may find them unattractive, while others may view them as a natural part of the body. Ultimately, physical appearance is subjective and should not be a basis for judgment or criticism.