I think this has something to do with puberty, i hope.?

well, im 13 and i hold tities. approaching boobs, is that majority?
Answers:

My hymen is springy can it repture by entering the penis or not to the first birth?

Boys can also enjoy tissue growth surrounded by the breast nouns. most of the time it is freshly an accumlation of plump cell what form it looke similar to you are developing breasts. Boy and girls both enjoy similar breast tissue but it is estrogen that engineer girls develope true breasts. If you are overweight, males can slickly look similar to they enjoy breasts. If you are overly concerned just about it, confer near your doctor.

Why do i have a feeling this path when i stop masturbatiing??

Yes, this is run of the mill. Please also discuss this issue near your mom and also your doctor at your subsequent check up for more information.

Masturbation?

Yeah, thats a organic growth.

As long they dont grow out of proportion.
This also depends on ur overall bulk / fat.
U better discuss near ur parents.

If they really look big resembling boobs, u should consult ur doc.
Dont go and get tensed almost this, it is member of growing age.