RoadboxMen's Compression Thights Leggings - 1/2/3 Pack Cool Dry Base Layer Pants for Training Gym Workout Running Cycling

Can these be used as regular underwear instead of something focused on physical activity? Just to keep everything firm and compressed below the clothe

Is it a good running leggings? I want to buy it as a Thanksgiving gift for my father

Can these be worn for swimming.

Hi just ordered these pairs of skin tight shorts could i change them for large please sorry for any inconvenience thanks guys