Two "effeminate" young men were hithchiking when a truck driver picked them up. After riding an hour or two, one of the young men said to the truck driver, "Excuse me, but I have to fart."

The truck driver said in a gruff voice, "Well hell, boy, just open up the window and lean it out."

The young man did so and let out the faintest "pfffffft".

After another hour of riding the other young man said to the truck driver, "Excuse me, sir, but now I have to fart."

The truck driver said, "Go on, buddy. Just lean it out the window and let'er rip!"

The young man did so and also emanated with the faintest "pffffftt."

After a while the truck driver spoke up, "Watch out, fellers, I gotta let one go." With that he let out a huge resounding, "BRRAAAAPPPPPPP!"

The two young men looked at each other knowingly and spoke in unison. "Virgin".