People of any age can date each other. If either of them are under age their parents have to agree to the dating. It is never illegal to date with parental approval. However, each state has their own rules about sex and intercourse so as long as there is

Is it weird if an 18 year-old dates a 15 year-old?

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.

What is the youngest a 15 year-old can date?

There is a so-called rule about dating: the youngest age you are supposed to date is half your age plus seven. So, if youre 16, the youngest age you should consider is 15 – because 16 divided by two is eight and 8+7 equals 15. We can write the dating rule as an equation: y = x ÷ 2 + 7 .