I love it when women do that. It is one of my all time favorite things.
yes, they like you
No, some guys may not be "excited" by a girls chest, for example: gay guys.
Some do. Some don't.
Some girls do, and some don't me personally I do not.
Some guys do this because the girls chest bounces when they laugh, other guys just like to hear their girlfriend or crush laugh - period.
Many guys prefer that girls have hair on one place only: their head.
Every Woman is different. But alot of them do. But bigger girls generally tend to like the bigger guys. I really don't know. The female brain is so complicated that even they can't figure each other out.
depends on the girl and where you're looking. most girls like guys who look into their eyes or at their face, but they dont like guys looking at their chest/breasts, butt, and sometimes hips or stomach. but like i said, it depends on what kind of girl it is, but girls don't necessarily liked being looked at by their "body".
if you mean, "why do guys like girls necks" then the answer is they just find it romantic if you huddle your head into their neck, or boys give females love bites on their necks sometimes.
Some girls are awesome, and like guys for who they are, some girls like guys cause they're hot, and some jerky girls like guys for their money and their cars.
Yes some guys do like modest girls.
There are many guys in the world that are attracted to and like transgender girls.