Why are jock straps designed so the buttocks is exposed?

[StormRider]

I never understood that. Why not make them like regular underwear except with a cup attached to the front?

 

[Viper GTS]

Maybe they want to see your ass?

Viper GTS <-- Wouldn't know, 'cause he's never worn one.

 

[Scrapster]

I'm not even sure what a jock strap looks like. I thought it just came with a cup. Can someone help me out here?

 

[toph99]

less material to make you hot?

 

[ManSnake]

Don't you know? Sex sell!!