If you mean Under Armour compression shorts, the advantages are that the shorts keep the muscles warm, reducing muscle strain and fatigue. They also help distribute sweat, avoiding chaffing and rashes. Other companies also make compression shorts.
Compression shorts are everywhere these days, some compression shorts might be great for one, but not so great for the next person. I'm aware that most compression shorts are on sale in the late winter to early summer. It's all about personal preference, I suggest that you go to into the sporting stores such as Under Armour, Nike, SportChek, and such.
Under Armour shorts can be found at many sporting good retailers. Finish Line and Dicks Sporting Goods are two stores that carry the Under Armour brand. Also the Under Armour website sells directly to consumers.
spandex/ compression shorts
Rugby Players Wear Compression Shorts Under Their Shorts Usually.
Personally I just wear compression shorts and an Under Armour sleeveless shirt. But it's totally up to you, and it would differ for different arenas because of the temperature.
I definitely think you should wear a jock, cup, and compression shorts. Shock doctor is my fave, but under armour is also good.
Compression tights can be purchased from Under Armour. This would be the best place to buy them from as I have heard only good things from Under Armour. They usually cost around 50$.
Adidas shorts are way different than Under Armor shorts. The material is completely different, and Under Armour is a way better brand, that is more durable and will last longer.
Yes! you should it is better
Yes, many guys tend to do it