A Little Payback

"Nothing gay now, you hear?" He said.

"Deal." I said, reaching out and grabbing his cock. My hand barely fit around it, it was massive. He grabbed my dick and together we started to fondle each other and stroke.

After a minute I started to get less dizzy and as I was thinking about how nice that was Kieth spoke.

"Umm, man, I don't want to freak you out but are you going soft or something?" he asked.

"No man, why?" I asked.

"Well, you seem a lot smaller, it's weird."

I looked down and noticed he was right. I could see the head of my dick earlier, it came out the top of his hand as he was jerking me. Now though it was nowhere to be seen. He removed his hand and as I looked down I gasped. It was almost exactly half the size. It was at that moment my stomach and arms and legs started to cramp up and I doubled over. I caught a glimpse of myself in a full length mirror in the bathroom and saw my now small (but still very hard) cock poking out between my legs, I was on all fours doggystyle while the big beefy Kieth lay against the door looking like he was about to pass out, but still stroking himself.

"Dude I think," I said, "I think you're getting smaller too. Look." I put my hand around his monster and where I could barely close it before I could now hide his cock completely with my hand. The cramps hit me again and I resumed my come hither position.

"Shit man, what's going on? I got the cramps something awful." I heard him say. I just closed my eyes and lay down on the floor.

After a few minutes I felt less awful and was tingling all over. I opened my eyes and looked over at the mirror. Laying on the ground where I had been earlier was what looked like a scrawny version of myself. I was slightly shorter it looked like, my big bubble butt had turned into a small tight one, my arms and chest had deflated and my tummy was tight rather than muscular. The same with my legs, long and supple but no muscle tone. I tried to stand up and fell over onto Kieth's lap.