What if you like someone but are too young?
I don't really believe in Big ages relationship and i find no love at all, Maybe for me ? 5 years is the maximum age gap to be in relationship and not more than that.If it is me, I can accept the difference of 15 years old. If there are too many, I am not very easy to accept. 
So meaning you can be in relation with the person same age as your son/daughter?