Umm i guess we were never raised to be affectionate like that. I never think to hug someone and sometimes i feel a bit weird about it because i have some female friends who are very affectionate like that. It doesnt bother me if someone hugs me, but yeah it does nothing for me, and my sisters, brother, mum and dad are exactly the same. Me and my brother have never hugged i dont think, my dad, well he hugged me on my 21st, time before that was probably a few years ag.
My mum? probably the most out of anyone in my family, maybe a few times a year, last time was when her cat died and she was crying to i thought i would be supportive and shit. My sisters? like never, my younger sister hugged me once and i was like woah woah whats going on lol
We just arent very touchy feely like that, I dont discourage it, it doesnt bother me but its just not a need i feel. i do recognize that other people feel like they need a hug and stuff so i always let them and it isnt usually uncomfortable or irritating or anything, just not something i ever think to do.