Do teen girls like to masturbate as often as teen boys?

Both boys and girls often begin before puberty. Orgasm is a neuromuscular reflex and is possible before puberty, and many boys have orgasms long before (in some cases years before) they are able to ejaculate

My girlfriend teen sister told us she masturbate often and wanted us to buy her a toy and now she uses it every time she visits us but she doesn't shut the door and I have walked in on her a few times as a guy I feel embarrassed but she told her sister that she wants me to watch and so my girlfriend has me for her benefit it helps her orgasm faster

That's so cool ,you both get to enjoy it