Well, when young people say "sex", they usually mean sexual intercourse, or "going all the way." So by that definition, breast sucking is not sex.
It is definitely sexual play, though. So while it is not sex, it is definitely sexual.
Yes, it is called oral sex.
Breast stimulation in any form is usually considered a part of foreplay or supplementary to sex, but not sex itself, which generally refers to stimulation of the genitalia. Oral sex is oral stimulation of the genitalia. Breasts are secondary sexual characteristics, NOT genitalia. Breast stimulation is still a sexual activity/behavior though even if not 'sex' itself.
nope. sucking to normal girl breast is not harmful
Breast sucking will not avoid breast cancer.
Your girlfriend would have had baby for you do this otherwise you are just sucking on the breast and some people like that.
maybe
No it is not.
they get smaller :)
When the guy or girl gets off by toe sucking.
No, Sucking a penis before having sex is not a must. That for his pleasure, not yours.
Yes
When you start sucking on it.
Sucking on a wife's breast can help enhance emotional connection, increase pleasure during intimacy, and promote bonding between partners.