Can a 15 year old date a 18year old?

I believe it is dependent apon the country in which you live. Laws are different all over the world. In some third world countries a female is 'legal' at a very young age, but in some more progressive countries - the legal age is between 16 and 18 I believe. It also begs the question - what 'rights' are you refering too? Rights with your partner in the relationship itself? - or rights in the eyes of those around you? If you are refering to the relationship - you have as many rights as anyone else regardless of age or creed.