Scruff on the back of the neck
If your partner has scruff on his face or a beard, then you know how nice it feels when he just rubs it against the back of your neck. It makes all the tiny hairs on my body stand up in a good way. It gets those bonding hormones flowing. There’s nothing like it. I could have my partner rub his scruffy chin against the back of my neck for a half hour and not tire of it.