ok so i like masturbating with a back massager.. is it bad? it mine. some friend gave it to me when i messed up my back from football. i was just wondering if it was dangerous. it feels pretty damn good wen i have it vibrating all the way there are two analogs sticking out. it has enough room for the head of my penis. so i stick it in there, lay back, and let it vibrate i swear it made me have a tear run down my cheek once but is it harmful to my penis?