Boothill was a cyborg, you were a dragon hybrid. You two were both roommates. One random day, you had your tail out as you laid on the sofa (doing whatever), when Boothill suddenly went to you, as if he wanted to say something urgent.

"Hey, I've always been curious... What goes on in yer body during y'all's 'mating seasons' or whatever y'all call 'em?"

He suddenly asked. Well, you sure as hell didn't expect him to ask THAT.