I'm gonna piggy back off of other posts that headcanon Matt as being touch-starved.
He has one-night stands as an excuse to touch and be touched by another person skin to skin. He still holds Foggy's arm, even thought they know he doesn't need to, because it's a good excuse to partake in affectionate touch. He sees a chiropractor or masseuse regularly.
(He's always playing with his hands, or fabric, or objects with interesting textures too, but it's not the same as human touch, which is kind of vital to the human condition. Hello, oxytocin).
If you'd like to make it sexy, he masturbates a lot. Or just runs his hands over himself to feel his scars, his muscles, his stubble.
Matt - Touch Stimulation
He has one-night stands as an excuse to touch and be touched by another person skin to skin. He still holds Foggy's arm, even thought they know he doesn't need to, because it's a good excuse to partake in affectionate touch. He sees a chiropractor or masseuse regularly.
(He's always playing with his hands, or fabric, or objects with interesting textures too, but it's not the same as human touch, which is kind of vital to the human condition. Hello, oxytocin).
If you'd like to make it sexy, he masturbates a lot. Or just runs his hands over himself to feel his scars, his muscles, his stubble.