I don’t remember the Cuban Missile Crisis, but i do remember Kennedy being shot.
Anyway – in answer to your questions:
Don’t get a complex, just keep on enjoying yourself. Best not to give up & get fat. I feel worse now than I did when I was 8kg lighter.
And yes, you’ve got years left in you.
Mrs M has been chatted up by 70+ year olds, and there was a thread on here the other night about a couple of 90+ and 100ish having sex, so there’s loads of time yet. 40 years-worth, in fact.