You are injuring my feelings by talking about something an old man like me forgot. What are you talking about? LOL

Love and Desire are not generation dependant. They are known since the creation of man and woman and will continue to exist.

The difference is simple and obvious. If both parties can "hold their horses" for a long period without affecting the strength of love then it is Romantic love. If either party changes in shape or fails to perform properly and that results in weakening the love then it is lust and desire. Unfortunately this lust and desire only relation is discovered after it is too late sometimes.