When I was 17 and worked in retail as a cashier, I had a very old couple come through my line buying a wok. The husband who was at least 85 started making conversation with me about the wok, and asked if I liked Chinese food. "Yeah, I like Chinese."
"Do you want to go out with me to get some Chinese?" He winks at me.
"N-no sir."
"Oh. Well." He looks a bit disappointed and turns to look at his wife who is on the phone with someone. "Would you at least like to come home with me and live in my basement?"
"…no."
The rest of the transaction took place in terrified silence. His wife never said a word. I wonder to this day if he was trying to joke, because he sounded so sincere, or if he was suffering from dementia or something else that make him not realize how creepy that sounds to someone young enough to be your great grandchild.