Really? I personally think that if two people really love each other, then they should just go for it no matter what the age difference is. My mum and dad have 10 years age difference, and my mum is the oldest.
But like I said, within reason. A 85 year old man with a 14 year old girl would just be wrong.
Tell me about it. My mum and dad would FREAK if I brought home a 20 year old guy.
Well of coruse, that's just wrong