Stand in a clear area, close you eyes and lean forward until you are increasingly off balance. When you stop yourself from falling, look to see which foot you moved to restore your balance. If you used your left foot, you left side is probably your dominant one. Sitting comfortably, fold your hands together. Notice which thumb is on top.
Lefties generally have the right thumb on top.
A date is a job interview that lasts all night. The only difference between a date and a job interview is that there are not many job interviews where there's a chance you'll end up naked at the end of it. They made me do things with my right hand.