20/m I'd probably be pretty embarrassed at first, but then after going home and thinking about it it'd be a nice confidence boost. That being said, it'd probably take you a long time to convince me you're not just saying that to be nice or something. As /u/ShutupPussy said, a lot of it is "big blocks", rather than just your stereotypical r-r-r-repetition s-s-stutter. I'm pretty self-conscious about how I look when I do this, and even more so about that I also do a head-banging motion when I'm on a block and have trouble breathing. I really just can't imagine anyone finding that sort of stutter attractive; evolutionary-biology-wise, it seems like it wouldn't exactly be the greatest survival trait.