my 8 year old ds hugs/kisses/holds hands in public and private. Tonight after karate he ran up, jumped onto my lap and gave me a hug and a kiss lol
He is also very sweet to dd with lots and hugs and kisses.
I think it is part nature and part nurture so don't think all the hugs will be over soon. I always heard the opposite...that girls are way more likely to ditch the hugs etc