Just go by the formula first postulated by Malcolm X;
The perfect age of a woman for a man is half his age plus 7.
so thats
1/2(n)+7=the perfect age!
Hey once you are legal and mature enough to handle these situations you date who YOU feel you should date, not anyone else. Everyone else just hates, they don't understand what goes on behind closed doors between you two (and between the sheets). These people are what psychologists would call 'cognitive misers', they take only outside information (age difference) and make a judgement on it, rather than taking in the necessary, relevant information (love,attraction,connection) to make a decision or judgement. These people take short cuts in thinking. And unfortunately, they are much too plentiful.
Don't listen TOO much to what other people say to you, you'd be suprised how many people do NOT have your best interest in mind as they let their own insecurities, jealousies, and personal motives get in the way, consciously or not.
Just remember the formula!