Hmm...never heard of yellow tights worn by guys to class. Oh well, the world changes every day. Usually, I've heard that guys wear black tights with their tshirt/leotard tucked in.
Ok, I admit, I'm not a dancer...but based on what i've heard from people, guys wear tights for a couple reasons:
1. Tights are for freedom of movement (imagine dancing in some jeans...baggy or tight) 2. Tights make it easier for instructors to see leg movement. 3. Some people just think tights look cool!
Ballet dancers are not the only guys who wear tights. Pro "wrestlers", cyclists, lugers, bobsledders, skiers, and speed skaters do too. Are they "girly"? No. [/i]