Does libido decrease with age?

At age 79 my interest in sex has not decreased however I now have ED from prostate cancer, have amazing orgasams but with no cum. Thats not all bad as less to clean up LOL. My main fetish is enemas and mostly butt plugs. I enjoy wearing one around for hours and often sleep with it in me. Go for several days like that before allow myself to orgasm. For most of my life I have enjoyed the sensation of a butt plug in me.

Still enjoy sex with the wife (same age bless her heart) but do her all orally. Gotten pretty good at it and can get a body quiver orgasm out of her about 1x month. So proud of her doing that with me. Married for 57 years and still think she is HOT if overlook some normal wrinkles We are both slim fit and athletic. Not model status but in a dark bedroom, cant see ha. Downside is she is totally anti anal and thinks my butt plug is disgusting, otherwise a perfect thing.

When timing is right I still love sex with men (very bisexual) which is mostly limited to enemas and finger play before we cum but yes I have been fucked and loved it. Problem now is most men my age have ED too so is all "toys is us"

Obviously libido does NOT need to decease with age and possibly even better.