Thong Masturbation
I recently purchased some unlined spandex thongs; they support my balls and stretch as my penis becomes erect. Whenever I wear them, my penis automatically becomes erect. I wear them around the house, in bed, and on the beach. At home, I am constantly rubbing my shaft (such as now). When my girlfriend and I visit or travel together, we lounge together in our thongs, which, of course, leads to bigger and better play.