Why boys give chocolate to his girl friend?

I think boys think that girls love sweet stuffs so a chocolate will do the best for them, I remember once a boy gave me a chocolate and I told him that you better take it back because I am on diet, I said so because I think boys give chocolate to make the girl fat and they stay as the are. So I don't like this theory at all. I will never be refusing fererro Rocher though.

Hi:) well, maybe it has to do with the fact that when choosing a present, we'd rather think of s.th which is loved by almost everyone? I'm a girl, I think if my bf gives me a heart shaped chocolate, I'd really get happy

In addition to flowers Chocolates interplated the symbol of my Love !!