I had one of the most life-enhancing encounters on a late-night Tube train; travelling home with DH the train was quite full and there was a group of 3 or 4 twenty-something young men fooling about, smoking (eek - on the Tube!!) and drinking from cans of lager.
I caught the eye of one who rather threateningly said "I know what you're thinking, I'm a **". I said that actually I was thinking what I'd give for a swig of that beer, which totally took the wind out of his sails. He offered me the can and I did indeed take a lovely long swig. Bless him, he then asked if I'd like a drag of his wacky-baccy cigarette, but I declined! We got into a conversation about football (both Spurs supporters) then he turned to DH and asked "She your wife?" DH confirmed that indeed I was, and the young man told him he was a lucky old so-and-so and if he (the young man) was a bit older, he'd marry me! He then asked if he could kiss me; I thought I'd better agree, and he gave me the sweetest kiss on the forehead and told me that he wished all old women were like me (!). I told him that I wished all young men were like him, and that I hoped he'd have a long and happy life, just before the train reached his stop.
I've never forgotten that sweet kiss ...