By doing mastubration which means to rub or stimulate their penis.
Sexual assault or Sexual herassment.
It's sexual relationship between the boy and the girl.
when boy is naked
Yes, it is perfectly possible although it depends on the comfort of people.
Secondary sexual characteristics.
If you felt romantic/sexual emotions about both, the girl and the boy, you are most likely bisexual.
Satisfaction on the woman's part is not a requirement for pregnancy.
The girl will not get pregnant unless she has sexual intercourse with her boy friend. There are high chances that she will go for sexual intercourse with her boy friend during taking a bath.
different sexual organs
Yes unless if you turn 18 before she turns 16 and you are having sexual relations with this person.
Tomboy is not a sexual orientation it is a way of dressing. A Tomboy is a girl that dresses like a boy.