Is this type related?
I've noticed people who touch me during conversation, especially during a first meeting, put me at ease and I like them better. This is not necessarily sexual in fashion, they just want to touch people to better connect, and it relaxes me and shows me that they like me.
My instinct associates it with Se, but does Si do this as well? I'd assume introverts would do it after they get to know you more, whereas an SeFi for instance would use touch to create the initial Fi bond.