I am 26 year old male. I have sex frequently and have been having the same for over 6 months. I ejaculate in less than 2 minutes mostly. This is due to furtive masturbation style practiced as a teen to ejaculate as soon as possible, where my pc muscle starts contracting as soon as I start stroking to make me ejaculate fast. However, I am able to overcome this tendency by squeezing my pc muscle. This sometimes causes retrograde ejaculation. How can I keep my muscle relaxed and how can I prevent retrograde ejaculation. Thank you.