Tsukishima's question is no longer "is Bokuto into boys" but rather "how many boys has Bokuto done this with", considering how confident the third year is and how he seems to know just what to do.

He squirms at Bokuto's touch but obliges, shifting so that he's half-sitting on the counter. He hooks a thumb in the waistband of his shorts and slides them the rest of the way down his legs, letting them fall unceremoniously to the floor. The feeling of the fabric unsticking from his damp cloaca highlights just how turned on he his already.

Bokuto's knee is still situated between his legs, unmoving, and Tsukishima shuffles his feet, spreading his legs a little. He feels exposed like this, even though Bokuto probably can't see much from this angle, but in a few moments Bokuto is going to be kneeling and putting his mouth on Tsukishima's-- on his-- yeah.

He wonders who else Bokuto has hooked up with like this. His team's setter, maybe? They seem very close, but Tsukishima had assumed it was only platonic. Now, though, he's not so sure. Maybe they'd stolen away for surreptitious trysts before, too, although Tsukishima can't picture Fukurodani's calm, poised setter agreeing to doing it in a place like this.

Since he's so curious, he finally gives in and asks.

"Have you done this a lot?"

It's only after the question's already out that he realizes what it sounds like he's implying. Nice, Tsukki.