i just turned 40 and I rub one out whenever the fuck i feel like it. i havent broken my record of 15 times/day when i was a teen, but Ive come damn close LOL. I'd be HAPPY to be able to just rub ONE out then go to sleep. Give me another decade I suppose lol.
btw, take a look at your local craigslist. there are more 50yo guys on there than 20, even ones with gf's/wives. so being horny as all at 50 isnt by any means unusual or unique.