Never done a headcanon post before but here goes 😉
Matthew loves the smell of Will’s aftershave. The one with the ship on the bottle. It was the first one he bought for himself when he was a teenager and it reminds him of how alike he and Will are. He sneaks a bottle in for Will, wrapped up in nice paper. “I got you something. I was thinking you could uh….wear some tonight, when I come to your cell.”
Will smiles and nods, blushing. It’s been a while since anyone bought him a present. And he’s happy that he’s found someone who loves the little things about him.