Being the only guy in the class helps too... :-P (kidding).
I just enjoy stretching, and stretching with weight (body only) like in warrior 2. I suck on the flexibility, but that'll come some day. Oh, and in a twist, guess what spasm? that's right the back muscle that was giving me problems over the weekend.
I also asked the yoga instructor, and her right hand lady, how hard it would be to get a self defense class added to the schedule. they both liked the idea. SO tomorrow I will be asking my masters for permission to teach one (see if they think I'm qualified), and then talk to the management office.