I feel like a hug and a kiss is a bit more though...it creates connection, it's not that mechanical, it's "human", alive. That something that can't be measured..But this is how I see it, I understand that there are different perspectives.

But yeah, hugs in a social platform are somewhat a different thing than hugs IRL.
As mentioned above, I also feel that the "hugs" on this forum are more personal than the like on FB, I appreciate them more. I am more open and vulnerable here than there, more deeply myself. If that's ever possible.
I don't know about the dopamine high though...I feel more of a validation, not feeling alone, support kinda reaction.