maybe they've started reacquainting with each other this year from hanging out being rusty musicians together at a few shows? actually billy has a (currently NPC) domme that he's entangled with both personally and professionally that's the lady that introduced him to all of these shenanigans, so we can definitely make that connection work. she's pretty well known in the scene and a total pro, so it's possible colin knew of/had met her even if he didn't use her services previously. in any case, he's totally down to shoot the shit about it lol. he might advertise being in the scene and be relatively open about sex in general, but he's much MUCH more low key about his personal proclivities for sure.