It made way too much sense. Theo really didn't understand why but he couldn't find it in himself to fight it. They liked him and liked spending time with him. It was weird but he could tell they were in love with him.
Headcanons under the cut.
Hayden bullies both of them jokingly but sometimes goes too far and will immediately notice and apologize
Liam tries to get them to play lacrosse with him but Hayden really couldn't care less and Theo doesn't really understand how it works
Theo really enjoys laying in bed with his partners, he likes being somewhere soft and being with his partners
They don't have specific spaces in the bed and more or less just fall asleep wherever they land, though Theo really enjoys being in the middle, they cycle through it alot
The three of them text each other all the time if they are not with each other, though they are barely ever separated from each other
Theo is extremely hyperfocused on his partners and their emotional states, he tries to help out with panic and anxiety attacks but sometimes he's just not the best at it
Liam has playlists he's made for each of his partners and gets really secretive about what's on each playlist
Hayden goes for runs with Liam in the morning as way to get out excess energy, sometimes Theo will join but Theo really enjoys a lazy morning so it's not often that he'll wake up to run