[dfwgator]

Just make sure they are really women, look at the hands, that’s always a dead giveaway.

[Lee N. Field]

Just make sure they are really women

That was my immediate thought.

[Mr. Jeeves]

Just make sure they are really women, look at the hands, that’s always a dead giveaway.

It's the height - Thai women are usually very short. If "she" is 5'6" or more, beware. :)