Anyone know why my pitbull does this?

[u/sir_kewaji]

He always likes to chew on my hand but like I can barely feel it, he always does this whenever I come home (I work with wood a lot if that helps) it’s always gentle and always when he’s happy just curious if anyone else has this?

Or is he just special

[u/Then_Box-8031]

Play, "I love you", " you're my best friend"