Okay, well i know this is TMI or gross.

But i also get the urge to masterbate when in class at school it gets so intense to the point were i image my teacher doing it with me in the class room. I kind of day dream. I usually asks to go to the bathroom and then masterbate , i feel so gross and wrong afterwards but it's an urge i cant get over it makes me want to do it right in the class room , I'm 18 year's old . How can i stop this?