wearing jeans

Yup! its a fact if you're wearing too tightly because your blood will not be able to circulate in the rest of your body. So you should avoid wearing tight clothes not only jeans. All constricted items like rings that are already tight should also be avoided. But wearing a jean is not at all a problem. As long as its clean (lol).

I doubt that wearing jeans everyday is harmful, unless they are too tight. Why wear them so tight anyway, isn't it uncomfortable? I heard that tight clothing may cause a low sperm count in men, also riding a bike, because of the hard seat. Just buy a size bigger, and don't use hot water to wash them. I don't think the human body was made to wear tight clothes anyway.