I have a cousin who has no hangups with dating guys 20years her junior, even more.
It's not my thing though. There are some wonderful younger guys around, but I think I would rather see them hanging with someone closer to their own age than with an old broad like me.
On the other end of the scale, I have no problems with 10 years older than me either, but just figure I would rather see what my own age group has to offer before getting desperate and hitting the 50's
Age gaps are a personal thing. Some are affected by it, some are not. Having been married to an older guy I would have to say it doesn't bother me...I am just getting old and fussy, I suppose.
Can't say that the sex life was affected at all, as the older half was a male nympho (is there a word for that ?)...nationality, nationality, nationality. Three words that can affect a relationship.
There are some bridges that can't be crossed...and I don't care what other people think. I have seen enough interratial marriages crumble...I have seen enough aussie women severely under the thumb because their foreign hubby comes from a nation where the men are the boss. The other fizzer is religion.
To sum up...it is best to stick to your own kind.