This depends on the girl and the size of their chest. It will vary between brands and person.
There is no medical reason to intentionally sleep or not sleep in a bra. As a matter of comfort most women prefer to take them off at night.
There is no ideal bra size. If you enjoy running you might prefer to be a smaller size, while other people prefer to be a larger size. There are good and bad things about all bra sizes.
Yes nooooooooooooooooooo
Most girls get bra's at the age of 11 or 12
bra
It helps a lot.
no not at all..
bra
Not usually, only if there is a built in bra.
you can get a bra measure from primark
That would depend on the girl and how comfortable she is with you. If she wants to be felt up she would probably prefer it off. If she barely knows you, it's probably staying on.
Take it off