I masturbate several times a week. I use petroleum jelly lubricant. I have over 275,000 erotic photographs on my computer that I masturbate to. I've been collecting them since about 1997. Sometimes I masturbate twice a day. On weekends I masturbate for 3, 4 sometimes more than 6 hours. I take lots of breaks so I don't accidentally have an orgasm before I'm ready. My best orgasms are usually after the 4 to 6 hour mark.