Even though we all know it's inevitable, aging has a way of sneaking up on us, and often in ways we don't expect. The best people to speak on the truths about aging, of course, are Boomers (those born 1946 to 1964) and Gen Xers (those born 1965 to 1980). With decades of life under their belt, these folks possess wisdom and insight into what it's actually like to grow old that they can share with younger generations.A Reddit user posed the following question to Boomers and Gen Xers on the hilariously named /AskOldPeople channel: "What’s something about aging that no one warned you about, but you wish they had?" Folks did not hold back. Gen Xers and Boomers opened up about their first-hand experiences and let their good, bad, and ugly experiences fly. Aging comes with ups and downs.Photo credit: CanvaHere are the best responses to the warning signs about aging from Gen Xers and Boomers:"The slow loss of everything, your abilities, your health, your friends, relatives, places you loved, etc. Just the eroding away of everything." —@ BreadfruitOk6160"All the loss you endure." —@southerndude42"I wish they had warned me that it's OKAY 'not to do anything' when you retire. My husband and I have been retired about two years now, and it's been wonderful. But we're not jetting around the world. We are just relaxing, enjoying being home. And that's okay, it doesn't mean we have a worse life now." —@slenderella148 You may want to just chill at home, and that's okay.Photo credit: Canva"The invisibility." —@TimeSurround5715"Aches and pains don’t go away in a day. Sometimes it takes a week." —@OscarTravolta"Start appreciating the smallest things… like a quiet morning, or when a friend texts u a meme outta nowhere. those tiny moments hit diff now." —@quietswoon"It’s so much harder to gain muscle once you age." —@GroundAndSound"That eventually you will end up in that CVS aisle you always skipped because it didn’t pertain to you." —@IntentionAromatic523"How fast time goes by. I was 21 yesterday. Now I'm 69. Time went by way to quickly." —@Dry-Cause2061 There's a freedom that comes with getting older, too.Photo credit: Canva"That I would feel this great. And content. And so much more in love with my SO, decade after decade. That there would be as much joy in walking fast laps as there was in running full court basketball. That for all the travail I've had a wonderful life. That it would become so easy to understand Robinson Jeffers:"Still the mind smiles at its own rebellions,Knowing all the while that civilization and the other evilsThat make humanity ridiculous, remainBeautiful in the whole fabric, excesses that balance each otherLike the paired wings of a flying bird."—@Own-Animator-7526"All the napping! I've never needed so many naps..." —@Familiar_Collar_78"Menopause. I knew so little about it beyond hot flashes, but what absolutely NOBODY told me was: after 40+ years of mostly painful, heavy periods, it is a GLORIOUS feeling not to have a period anymore.