Whenever I am on the elliptical or treadmill, I have to dig down and move stuff around or it rubs till it hurts. I wear cotton underwear, the fruit of the loom 4$ each kind. I'm not talking about the type of friction that is remedied with Glide either. Are men supposed to wear special underwear like women who wear sports bra?

Oh and I went to a specialist running store and they didn't have anything besides cycling shorts.

If there's a need, there must be a product:
Men's Running Briefs - Athletic Boxers - Running Underwear, Under Shirts ¿ Base Layers ¿ ASICS, Brooks

But check out this thread:
What is the best underwear for running? | Uncrate Answers

Personally I find that simple microfiber boxer briefs work just great. Must be black though.

Thank you!

Normal briefs, at least some of them, give good support but bunch up between the legs when they get sweaty. They also can rub the crease at the top of the inner thigh raw. I know, I used to run a lot.

Boxers won't give you any support at all.

You'd do much better running with "trunk" underwear:

http://cku.imageg.net/graphics/produ...57t210x497.jpg

I wear silk boxers briefs... It's like riding in a Cadillac.