I used to masturbate regularly, noticed one day my penis shrunk from six and three quarter inches to amere five inches. now has a sharp hook like small banana which was once straight as an arrow, also only half the girth/thickness. masturbated 1st time in 3 months, which was intense, followed by pain around the pelvic area./and or scrotem area.is it possible to pull and shorten these mucsles from masturbation?