This is a take on Wigmans thread "Why would a man want to do yoga?" (Sorry to hijack your idea mate, but I've no imagination)
Well I don't know about yoga, but it reminded me of this aerobics video - and I don't need any encouragement to post spanking material! As for the two good reasons....if you have to ask then you're on the wrong site!
Apparently the lady in question is an Aussie model! I love those Antipodean babes!