Just for fun?
Human nature fascinates me and I quite enjoy testing it out sometimes, nothing sinister, just a bit of fun.
For example: DH adamantly declares that colgate toothpaste gives him ulcers, refuses to use it. One day after finishing our macleans tube I went and bought a tube of colgate and filled the macleans tube with the colgate, just to see if he actually did get ulcers, which he didn't.
He refuses to use quilton toilet paper, will only use sorbent or kleenex, so sometimes I buy quilton and tell him it's sorbent and he will quite happily use it.
The next one is a little mean,
My MIL thinks that anti-depressants are like panadol, and that you take one and you magically start to feel better instantly, until it wears off (now admittedly 40 years ago they were a bit like that) she asked me for one of mine one day cause she was having a bad day, I am not in the habit of sharing prescription pills but thought it might be interesting to try out the placebo effect so I gave her an artificial sweetener tablet (just to clarify she isn't depressed and I have no reason to think she is, if I thought it was depression I would have suggested she go see her GP). 20 minutes later she was flouncing around the room saying how much better she feels.
I'm sure I'm not the only one that does this sort of thing. So share