When I was young, we had a lot of interesting things at home. My Dad was a collector of unique showpieces and display/household items. He also had an extensive crystal collection. Since I wasn't allowed to touch the breakable stuff like his precious crystal / porcelain collection, I felt free to toy with what was in regular use. Like a couple of coasters.
They were round and light-hearted in design and caption. I remember two of them specifically. One had a :-) Smiley face. The caption was SMILE. IT MAKES PEOPLE WONDER WHAT YOU'RE UP TO.
I caught on to that right away and enjoyed doing it right through my teens (not on purpose perhaps). Whenever i smiled, people did ask why i was smiling, or became uncomfortable. That was fun.
The other coaster I recall, had this caption with a bull caricature: "I'm a bit of a bullshitter myself, but 'YOU' go ahead, I'm listening." For the longest time, I didn't understand what it meant. I didn't know what bullshit meant, didn't dare ask anyone, & it just didn't strike me to check the dictionary I guess. But the then-forbidden word 'shit' in it made it a fun coaster for me, which I enjoyed setting out on the table whenever we had company.