My First Huge Gay Cock

My first gay sex experiences were all oral, meeting a guy, and sucking each other off. Most of the time, I and my partner would get naked, and make out for a while before getting down to business and sucking cocks. It was always fun, but I had an urge to go farther, and find out what it was like to take a cock in my ass. I had topped a couple of guys, at their request, and liked it, but I had a feeling I was more of a bottom. When I watched porn, I’d focus on the guy getting fucked, wondering if it felt as good as the actors made it seem. Scenes of big thick cocks pumping into a willing ass made me hard, and I also wondered if I could handle a cock that size. The idea to get a dildo came to me, and I watched a few video clips online of guys doing themselves. It looked like fun, so I did some browsing, and located one that seemed right. 6 inches long, moderate thickness, and a slender head ‘to aid insertion’. I laughed at that line, and ordered it, and some lube. A few days later it arrived, in an innocuous box, just as the site had promised.
I immediately stripped, and went to the bathroom. It had a suction base, so I stuck it to the door, slicked it up with lube, and smeared it around my asshole. Then I got on hands and knees, and backed up to the door. I had to reposition the dildo, and tried again, this time it bumped against my puckered ring, in just the right spot. Taking a deep breath, I pushed back. At first, nothing happened. I could feel the head pressing against my hole, but...