The Only Difference is the 'S'

"That's it; now fuck me if you like."

He was gasping the words into my ear and his fingers were gripping the flesh of my back he was so aroused. I was so excited at what I was doing that I couldn't even reply, couldn't tell him how completely I wanted to fuck him.

I pushed myself in deep, burying my cock right up to its root in Sam's rectum, feeling the warmth, the smoothness and the tightness of a man's anus around my cock for the first time, something else to add to the mounting list of firsts that night. When I was in as far as I could get I lay motionless on top of him, just savouring the thrill for the moment.

"Does it feel good?" He asked me softly, needing to know how I felt.

"Incredibly." I told him. "It's bloody fantastic."

"Are you glad we're together?" That question came a little shyly, as if he hardly dare ask.

"Yes." It was a one word answer because I didn't have the vocabulary to tell him just how glad.

He gave me a quick, affectionate squeeze as I answered and I felt him bodily relax.

"Will you cum inside me?"

He asked the question as I started to thrust slowly into his arse. I nodded mutely and he began to move against me, increasing my penetration and intensifying the sensation in my cock.

Fucking a man face to face is not quite the same as fucking a woman that way. Because of the difference in anatomy the man being fucked has to roll himself back further, making his partner bend a little in the middle and so thrust downwards rather than just fore and aft. That might be just a little less comfortable, but I now found that it has the benefit of giving me far better control and far deeper penetration. I could bury myself completely inside him, and I did just that every time I pushed into him.
I suppose that up to this point I was still half telling myself that I was with a woman, after all he was still made up, although it was rather smeared, and his long slender legs gripped me just like woman's.