it absolutely is, it took me years to get over it after we broke up.
to be young and cute and have a guy, all manly and experienced, taller, with the hairy chest of a well built man (instead of a boy) in front of you, who is also crazy for you is a dream come true.
the guide thing is BS, though lol.
all things said, I think many younger guys are very clingy and needy in a relationship, I know I was when I was 18 and I screwed it up so my advice being 36 now is to not play the princess role with a 30-something guy (not saying you'd do that, I speak in general here), sugar daddies want that but your regular guy wants a similar by his side.