Do girls realise their boobs are toutching someone during a hug?
Just the same as men know their pecs are touching someone during a hug. How stupid would someone have to be to not recognize that fact? And why is this significant to you?
With me it's still largely bone and muscle, though I know what you're saying.
its depends on their thinking,
Of course. But it is unavoidable. They don't think of it as being something sexual, and it is not an invitation. The sexuality of it is in YOUR mind, not hers.