When you step back and think about it, acting is actually quite a strange profession. Your job is to basically live inside someone else's skin for hours or days at a time, and convince anybody watching that you're a completely different person. You're essentially being paid to lie to people!
There's a lot that goes into giving a convincing performance as an actor. You might be required to speak in a language or accent that isn't your own, for example. More intimately, you might be asked to kiss someone you'd never normally dream of kissing, and pretending to like it.
Even for the best actors in the world, the 'pretending to like it' part isn't always possible. You might not like your co-star. Your co-star might have terrible hygiene. There might be ethical issues to consider. Every star on this list said 'no' to kissing in front of the cameras!
