Bi Panic part 2

Sam slid down between my legs and began sucking me off. I took my shirt off while he worked my pants down to my ankles. Blowjobs from men have always been better in my opinion, and I had to speak up rather soon to warn him not to finish me too quickly. He stopped, stood up from the floor and took his clothes off, throwing them into all different directions. His muscles were even more accentuated by the dim lights and his dick's size was quite respectable. He bent over the couch, handed me a bottle of lube from behind it somewhere, but stayed in his bent-over position. I hesitated. Don't get me wrong, he was incredibly hot, bent over like that, but I've only ever hand anal sex with my girlfriend of the last years before a few times and somehow felt like I needed a change.
“What are you waiting for, Joe? Don't you want it, too?”, he asked.
“Sam… Do you think… Do you think you could fuck me?”
His face instantly changed. He didn't seem disappointed at all, tho.
“Joe, nobody needs to fuck anyone here.”
Sam stood up and hugged me.
“But if you really want to, I can show you a really good time.”
The words were a mere whisper, but had such an impact on me that I kissed him instantly. When I let go, I laid down on the couch, ass up.
“What about condoms?”, Sam asked me from behind.
“I'm clean.”, I said, “If you are too, then I could do without it.”
I felt his hand gripping my hips and pulling me up to him. His meat was resting on my lower back. Then there was the squirting sound of lube. The cold liquid landing on my butt crack made me shiver and I shivered a bit when his warm hands drove through my cheeks, further spreading the stuff.
“Are you ready?”, Sam asked, slowly pushing a finger into my rear.
I nodded. Then a firm grip of his hand spread my butt cheeks, his dick poking my ass. Another squirt of lube on his tip and he put the bottle away.
I began pushing my ass back, making his dick strain against my butt hole until it flopped away. A gentle hand grabbed my hips while I felt his dick pressing against my entrance. I had to relax. Closing my eyes and concentrating on the hand on my hip, I let go of the tension and felt his tip entering my rear. From there on, Sam just put his free hand on my lower back and slowly thrust his hip forward. It took him nearly five seconds until he bottomed out. I tried to get a little more comfortable by positioning my knees a little further apart. I felt his dick stirring inside me, twitching as he leaned forward and pushed my knees back together, squeezing my dick softly between my thighs. Sam returned to his previous position, one hand on my hip and one on my lower back, and began picking up a slightly faster pace, thrusting in and out of me. I'm not gonna lie, at first it felt like involuntary taking a shit, but every time he thrust back into me, he hit all the right spots and continued to do so.
After some time, he pulled me up into a standing position, so I was standing with my back to his chest while he kept thrusting. One of his hands reached around my chest, pulling me closer, while the other trailed off downwards, grabbing my dick. Unknowing what else to do, I reached behind me and tried to get a hold of his hips, while he started jerking me off whilst still taking me from behind. Soon I began to groan in pleasure, growing louder and louder over time.
When I finally hit my climax, I shot my load all over the couch, myself and his hand. Sam brought his messy hand up to my mouth and made me taste my own cum, before I felt him going faster and faster and then stopping for one- two- three last strokes. I felt his dick throbbing inside me, shooting his cum deep into my bowels.