Jason's body seemed to crave Tim. Even the slightest touch made Jason's muscles tense. This satisfied Tim's desire for control, so he became careless.
When Tim couldn't resist the temptation and inserted Jason's penis inside him, active had become passive.
LRT GOD, I need Tim to put on the most obnoxious color lipstick and kiss Red Hood's mask. Jason, flustered slightly by the kiss, has no idea the lipstick mark is even left until someone points it out/or he gets home and takes it off