2 ladies make a twenty

Marg: I'll tell you one thing! I'm never going out with my friend Stephanie again!

Gail: Why on earth not? You two are best friends!

Marg: Yeah, well, last night a good-looking man walked up to our table at the bar, said hello, and told us his name. I told him that my name is Marg, and introduced my friend Stephanie. He said, "Wow! On a one to ten scale, you two ladies make a twenty!"

I said, "Really?"

He said, "Yeah! Your friend Stephanie here is definitely a 15!"