I've been thinking about this question for a couple days. My instinctual answer was "yes" but then I really thought about that and realized that's probably hindsight talking. My first time getting fucked was also with the first guy I sucked off, but several months apart - up to that point I was pretty regularly blowing him, and had graduated up to also regularly blowing a couple of other guys our age that we both knew, though everything was pretty DL for the most part - I don't know that any of them knew that I was sucking them all off on average once a week. My god the summer after this started was hot LOL.
Anyway, we spent a weekend together out of town down out at the beach, got pretty drunk, were messing around, I'd already blown him earlier in the night, and we were enjoying being able to take our time exploring each other's bodies. He was only really into making out and occasionally jerking me off, though he'd never do that spontaneously - it would only happen if we had time and after I'd suck him off. Seeing as we had the weekend to have fun, and nobody around to interrupt us, and were feeing no pain due to terrible cheap beer, he was being a lot more affectionate than usual (he was never a dick or cold but the dynamic between us wasn't really mutually affectionate per se). I was enjoying making him hard and teasing him, pretty much edging him but I didn't know that was a thing at the time. He was doing the same, teasing me both literally and figuratively (the latter being more about him being super clued in to my desires, and it was already clear to both of us that I was getting off BIG TIME just from getting to touch and worship his body and cock, so he would tease me by showing off his muscles and cock and body hair etc., and encouraging me to explore him and to do things to make him moan etc.)
I do recall that I kept opening my legs and pressing my hips and butt against him, but I wasn't consciously thinking "I want you to fuck me" it was just happening naturally. Eventually his fingers found their way toward and then in my hole, and it pretty much snowballed from there. Between that, my general lust for him, his dirty talk, and the length of time we'd been messing around that evening, it was a given what was going to happen. I realize now that I was extremely lucky and am grateful that I got my first time with somebody who was super patient, kind, and in the generalist of senses somewhat experienced (he had fucked several girls up to that point, including at least one anally, so while he wasn't a sex god yet he at least knew the basics to guide us). It was still awkward as hell - he'd never fucked a guy - and he also didn't last long one he got inside me because he wasn't anticipating the tightness. But he'd spent time leading up to it to play with my hole, finger me, get me loosen up and relaxed (he didn't eat my hole out that first time but he did try that a couple fucks later and lucky me he really dug it LOL).
I feel pretty confident about that first time being when I first learned I was a bottom... but it took a bit of time after that before I knew I was a bottom, if that makes any sense? I tried topping - it was with another friend I was sucking off; my first-time guy had zero interest in trying that, but once he started fucking me on the regular it didn't take long before I basically offered up my hole to 4-5 guys I was sucking off pretty regularly and 2 more of them took me up on it. I just wasn't into it and didn't enjoy it, and whenever I'd try, or whenever I'd be the one getting sucked, all I could think about was how much I wanted to suck him or get fucked instead. My experimentation extended to girls too (hence my 10%). Every time I tried something new it paled in comparison to getting fucked and the rush I got from making guys cum.
So it didn't take too long before I just pretty much started exclusively bottoming and developing confidence and pride in that, practicing whenever the opportunity arose (ahem) so I could become a great fuck, and unlocking the ways I get pleasure from my hole. To me it made more sense to lean into the stuff I realized immediately that I enjoyed and felt amazing, instead of trying to make fetch happen with stuff I wasn't that into.