How do you sprain your fum?

you get a sprain by hurting your bone deeply. also if you just got a shot and you move that body part alot

Sprains and strains can be prevented by warming-up before exercising, using proper lifting techniques, wearing properly fitting shoes, and taping or bracing the joint.

Ligament (tissue that connects two or more bones to a joint)

yes i have experienced the spraining of ones buttox and i could not have sexual fun for a few weeks :(

yes you can. usually while playing sports. the severity varies. you could have to get it X- rayed or even get an MRI.