Yesterday I was already having many dry O's with the Progasm. Up until the past week I'd been more or less exclusively using my sphincter muscles as contracting my pc muscles(too hard) made me urinate.I guess it was a disadvantage having been already acquainted with pc muscle exercises and fitness, only now I realise it's the very slight pc contraction that has maximum effect. It's definitely different from say training the biceps. Amazing all the different sensations you can experience...