Please and thank you don’t violate barriers. It does not allow someone into your space, you don’t have to give anything of yourself to say them, and if you’re a good person you probably mean them. A better example for what you’re looking for would be handshakes. It’s common in most western cultures at several social functions, and it can be considered rather rude to refuse one, it got a lot of folks angry during covid apparently. That’s where two parties acknowledge the social bindings that call for a physical touch establishing a mutual respect. I never miss saying a please and thank you, but best believe I’m still doing the ‘covid shrug’ when I turn down handshakes.

So, you’d tell your child that “yes, you have autonomy in this, but your feelings regarding your need for personal space matter less than your grandmother’s want for a hug” is what I’m gathering? Do you educate your mother on the child’s wants/needs? There’s a reason why people are educated that, as far as physical touch is concerned, nobody else’s feelings should be taken into account. If someone can’t love a child without hugs, then I don’t think they really understand the concept or application of love.

I’m not saying this is your case, the next bit is an extreme but important to the overall argument, I think. People have identified that exact thinking pattern in why they didn’t report sexual assault from a family member. Because they weren’t taught how to properly say no and why the right to refuse touch is important, it was that much easier to abuse them.

I dont like my picture on the internet. So I refuse all photos where possible. I have family, they take pictures, they’re aware of this and so I’m never the direct focus of the shot (you might see me in the background).

OP said they don’t want to take pictures with people, they shouldn’t have to take pictures with someone. Instead, you should be teaching your son to stand up for their boundaries, even in the face of ‘tradition’. If your kid says “I don’t like hugging grandma”, are you making them give hugs or are you encouraging them to tell people in their life, who they trust, how they feel?