He never knew
I'm a 36yo gay man. My first boyfriend, when I was early-mid-20s, was floored when I told him that I was a virgin- never had a boyfriend, never been to a gloryhole, nothing- because APPARENTLY, I give amazing head(his words). I told him I'd practiced on a rubber dildo and watched a lot of instructional videos, the truth is I'd been blowing the family pooch since I was fifteen. I sucked his cock on a daily basis when I could, including deepthroating, swallowing, licking, sucking and tickling his nuts, making the loudest slurping and gagging noises I could- all stuff my then-future boyfriend loved. Although he also liked hearing me beg, and seeing me show him a mouthful of cum before I'd swallow it, but naturally that isn't anything a dog would've taught me. To this day, I'm not sure which lover I enjoyed being with more.