In general for men the older they get the lower the sex drive. I can attest to this as my sex drive is not as high as it was 10-15 years ago (Im 31 now).
BUT although I get horny less frequent, when I am horny its just as strong as when I was 18. Its kind of nice not having baby batter on the brain as often as when I was younger though.
I`m in a relationship w/ a lady ten years younger....she and I are on the same page in the bedroom, but there are times when I`m like whoa....and she`s ready to go...I think I have a really high sex drive, but her shit is on turbo...