No I think she is just playing around with her friends. Some kids do that if they are close. Ask her if she has feelings for this girl.
Another word for learned behavior is acquired behavior.
Another word for excited behavior?
aunt
No, he only has one daughter.
daughter card or daughter board
Experimenting with sex is normal for teenage boys.
Ye. The noun "childhood" may be used as an adjective modifying another noun " days." It depends on the context, childhood itself portrays the days a person spend in childhood, so there is no need to explicitly specify childhood days. But in common usage childhood days is used.
Behavior that is unobservable in another person. Thinking is an example of convert behavior. (R.H. Ettinger, psychology the science of behavior, page351)
Your daughter-in-law's sister is not related to you, unless she is married to another one of your son's.
Call them and be the best yo can to mindless behavior
altruistic
Instinct