Why do I find old guys sexy?

I've always been attracted to older men mainly due to the fact that they're more mature. But recently I've noticed im attracted to older men that are in their 50s. What's up with that? I'm 28. And I have a 5 year old. Before it was just older by 8 to 10 years but thays a big jump for me and I cant figure out why. Anyone else? I know I've matured alot over the past few years..