One of the things I do "for a living" is run participants in psychology experiments. For my own research, one of the things I have the participants do is a creativity task in which they come up with as many ideas as they can based on a sentence or drawing (e.g. think of as many unusual uses for tin cans as you "can" ). Today, one of my participants, after having been read the instructions and told they can begin, just sat there. He didn't write anything; rather, he chose to just stare off into space.
It's not like it's a hard task or that it reveals sensitive information. I think it'd be pretty fun to do. Even if it wasn't fun, it's gotta beat sitting in a chair doing absolutely nothing. This made me realize that I have no idea what was going through this guy's mind. I will never understand what it's like to be him. We're both human beings, but when put in a situation like my experiment, he would choose to sit and do nothing, while I can't even fathom why anyone would do that.
This realization was kinda cool, because it means that my branch of psychology (personality: examining differences between people rather than similarities) is worthwhile. It may seem obvious that people differ in important ways, but when you read countless articles describing how humans, in general, work, you start to think that everyone is pretty much the same.
I think that if someone looks like a celebrity, you should only point out the resemblence if the celebrity is considered attractive. No matter how much a girl looks like Mimi from The Drew Carey Show (see left), you should not tell her that. You'd probably make her cry.
Hint: I've never posed like that in my life.