So if you're a singer you know that singing has a lot to do with muscles of the body for breathe support, etc. One main thing is having the muscles in your abs, rib chage, back, hips involved..I was in a voice lesson and a lot of times my teacher will stand up and feel her own sides etc to describe what needs to be done..a few times she's walked over to kind of show me....this week she walked over to me, got behind me and without warning put her hands right on my sides and was squeezing them, shaking them etc. to tell me I needed to be moving those muscles more...If I was more ticklish there, I definitely would have lost it. I almost considered faking it just so she would say something, but I didn't. She even put my hands on her to demonstrate and the devil on my shoulder did say "start squeezing", but I feel like I value my professional relationship with her does far outweigh trying to tickle her...just a funny story.