Is it illegal for a teen to date a child?

In a Nutshell: Sex between an 18 year-old and a 15 year-old is illegal in California, meaning any touching of “private parts” of either, even with consent of both parties (and perhaps even the parents of each teenager) is illegal in California because the age of consent is 18.

Why does a child prefer one parent?

Its not uncommon for children to prefer one parent over the other. Sometimes this is due to a change in the parenting roles: a move, a new job, bedrest, separation. One parent cares more for the infant, while the other parent spends more time with the older children.