You don't. Do not be touching anyone's breast that does not want you to. And the fact that you are asking indicates that you are not old enough to be touching breasts.
Because girls like guys with big muscles :)
some girls do some girls don't.
Not all girls have big breasts. Well girls bodys difer then boys do. its just like extra skin....
NO they dont..
Depends on the girl. Most girls say no.
only when they initiate it
No. There is much more to it than a body part.
That's a definite no.
Bcoz they are enjoyable when touching
It depends, if a guy knows a girl really well and has had sex with her before, he may know just where to touch her. However, if the guy is an idiot, he'll try to straight out touch her in places that make her uncomfortable (i.e. butt, breasts, etc.). Most guys have a habit of touching a girl's butt. It seems to not be as bad as touching a girl's breasts but most girls will be a little uncomfortable with it unless they are at a place with a lot of people and don't notice or are just very drunk.
because its part of their own body, and it depends on how big cause some dont like the size of their own breasts
It depends on the girl. Why don't you try?