After realizing that Tree is on a hormonal hair-trigger (and most likely doing more of that "HOW FAR CAN I GO IN FUCKING WITH TREE'S HORMONES" thing), he'd either send Tree in Tsunami's general direction and say "GO FORTH AND GET LAID" or tell him to go masturbate already. He won't actually DO ANYTHING HELPFUL beyond that because it's this line he doesn't really think needs to get crossed with Tree. Because then that starts to get into messy feelings stuff, and Katou doesn't want to deal with messy feelings stuff.

If there was a de-age game one day, would you rather A) de-age Tree, or B) have him have to be mom for six baby Turquoise?