So I did another search to see what masturbation really was. There was this amazing site that showed various ways to jerk off. I took a few of the w...ys and printed them out so I could do it that night. That peeing sensation was me wanting to cum and that is supposed to happen apparently and to just let it happen. After I was done with my information part and learned how to hold my cock in my hand and rub it up and down to drive me wild and eventually cum. I decided to download some movies. Roberta crawled up and draped herself across my knees, bowed her head, and in a little girl's voice, said, "I know I've been very bad, Daddy. Please give me a good, hard spanking, now." Then she shocked the crap out of me, when she reached back and used both hands to spread her cheeks, so I could see her greedy opening, and the wetness that flowed so freely.Whack ... Whack ... Whack ... Whack ... Whack ... I spanked her but not very hard. When she squealed too much, I slid my thumb into her. Wendy giggledat the sight of them erecting under her ministrations;they were like two independent creatures. Playfullyshe brushed the back of her hand over one nipple,enjoying the rubbery feeling and the way it bouncedback into position. Her mother winced at thesensation.“Ouch! That’s really tender right now!” shecomplained.“Sorry mom,” said Wendy. She looked down at her ownnipples which had also hardened into two tight littlenubs, but they were nowhere near. I was 18, my hormones were raging, and I would masturbate to pornography at least twice a day. I started to watch some sexy MILF action. Just before I started stroking to it, (underpants soaked in pre-cum), my mom had called me downstairs to tell me my uncle was stopping by the next day. I managed to hide my erection on the way downstairs, but I did have a pre-cum stained on my lower underpants, next to my thigh. I doubt she noticed, but she did know I masturbated, a lot. She would occasionally.