Older Men...
I'm a 20 year old female and for the last couple of years I've found that I only seem to be attracted to men who are about 20 years older than me, but not to guys closer to my own age. If I do like a guy closer to my own age, it's a head decision to like him, usually just to distract me from the older guys.
I've never told anyone and I've never pursued any of them, nor do I think I would start a relationship with one if he put the moves on me first. That's because I'm too ashamed and worried about what other people would think.
You might want an older man because there is something lacking in your relationship with your father. Or you might be feeling insecure for some reason.
If there isn't any reason that you can think of, maybe eventually you could go ahead and start up with an older man. You might have something meaningful to offer each other.
Guys of all ages are complete dolts. The difference is that the older ones have realized it.
As long as you advertise that a reason like this is why you like older men, then there is nothing to be ashamed of. If you like them simply because they drive Beamers then you might want to re-evaluate things.