I've noticed this change myself. And I think immortalgypsy is right, I think I have much softer features, I look kinder, gentler and so I'm way more approachable. Also my mannerisms re much more friendly. Not that I was some mean oger before lol. I notice this both on the physical and emotional level. People will touch my arm, give me hugs, or just connect with me on a more emotional level.
I've always been quite a touchy feely person so it doesn't bother me too much, and the emotional level I know have with my girlfriends and female colleagues is just awsome.
So whilst my personal bubble space has reduced dramatically, in fact it may have popped, it's not bothering me too much. When this becomes unwelcome men invading my bubble, then it'll be a problem!