Do your kids a favor. Cut them loose. It is easily the best thing you can do for them.
>>I was born in 1956. My “kids” are still at home<<
You do them no kindness by infantilizing them. Did your parents keep you sucking their teats until you were a grown person — wearing diapers?
God, if I was in my mommy and daddy’s home after I was 18 I would have shot myself in the head from sheer embarrassment alone.
Buy a set of diapers, give it to your kids, and tell them to live their own lives.