Check the goods

Verifying that another person's gender is what they claim it to be. Generally refers to verifying that the female with whom you are about to participate in sexual activity does not have a penis.

When I go to Thailand I always check the goods before I pay them.

Checking out the goods

Looking to see if something or someone is worth your time

I was in the club checking out the goods. I was at the party and checking out the goods on the grill