Statistically, couples who have a little or zero age gap between each other have better and longer marriages. Among celebrity couples in Hollywood, the age gap gets bigger and bigger by year. Everyone might get attracted to youth, but actually dating with someone who is significantly older/younger than you is seen as something bizarre in a lot of countries outside the US. Again, it’s easier for celebrities to find a partner. If you’re a 35 year old businessman, chances are you won’t find many 25 year olds who will want to date you. A 35 year old actor will have 25 year old women who like him because he’s famous, rich and doesn’t seem like a pervert in the media. And when a 35 year old guy dates a 25 year old woman, that relationship has a lower chance to work out than a 35&33 year old couple.