I had to stop after a few strokes as this was going to make me cum, and we were meant to concentrate on finishing our 'lesson'.I replaced Fred on the ...able and lay on my stomach with my face in the open hole at the head end of the bench. I saw a thick cock and big balls appear below me and knew Fred was there. He massaged my back and moved his hands down my spine as I reacted by raising my hips off the bench to meet his hands as Dean massaged and held my feet. I felt Fred's cock pressing. He had a couple of unfortunate possessions that had given him grief in the past couple of years. The first was the surname "Potter".He might have lived that down eventually had it not been compounded by a bicycle accident a few years earlier that had left him with a jagged scar across his forehead and the necessity to start wearing glasses just before the first publicity pictures showed his namesake with an identical pair.Harry's parents weren't so well off that he could simply throw away a. I had to make this good to save Jim's job too. I knew i was going to have to play the part of a whore to make this work. He let out a low whistle, and said `I think i am going to enjoy this Jill`, he laughed. `Take ya bra off, let me see your cold nipples. Good trick that, been using it for ages with the girls in the office. Haha.` What a fucking pervert, i thought. I unhooked my bra letting my breasts spill out, and yes, my nipples were enormous. He walked towards me, reaching out and tweaking. "That's better," Nate enthused. "Did you hear both the slap and sting sounds?" I think so," I replied."Try some more," Nate encouraged.I delivered another dozen strokes, each time gaining a little more confidence. By the end Nate was complimenting me and saying that I was beginning to get the idea.Then Nate called a halt. "The cat is pretty easy to learn to use adequately. However, a real, single tailed whip is a lot harder." He returned the cat to the wall and picked up a whip with a single.