"Not Half Bad" joke

There were 2 old-maid sisters... both virgins. It's Friday night and Gladys looks at Betty and says, "I'm not going to die a virgin... I'm going out and I'm not coming home' til I've been laid!!"

Betty says, "Well, make sure you're home by 10 so I don't worry about you."

10 o'clock rolls around and there's no sign of Gladys... 11 o'clock... 12 o'clock... Finally about 15 after 1:00 AM the front door flies open. In runs Gladys... straight to the bathroom. Betty goes and knocks on the door, "Are you okay, Gladys?"

No answer, so she opens the door and there sits Gladys with her panties around her ankles, legs spread, and her head stuck between her legs looking at herself.

"What is it, Gladys? What's wrong?" asks Betty.

"Betty, it was 8 inches long when it went in... and 4 when it came out. When I find the other half you're gonna have the time of your life!!!"