what do you guys think about people with significant age differences dating, or being married?

My dad is 5 years older than my mom.(they are divorced now though) But I remember on the Maury show, a while ago they had a show called "Odd couples". There would be some 70 year old dating a 20 year old or whatever. I think that's just insane, but it would be different if they were just 10 years apart.

But, Where do you think the Line is drawn when it comes to age difference?

P.s. If this thread is pointless tell me and I'll delete it........