Who said it was supposed to be fun?
Yeah, I've pulled the Dulfersitz out many times, but not much during the summer time, so I'm usually wearing some slippery g-tex pants. If you turn sideways the rope will rest more on the side of your leg, stabilizing you and getting some pressure off your balls.
Like I said, it's nice for days where you aren't planning on doing any prolonged climbing or rappelling - just take a short rope and you're all set.
Have you ever done a Dulfersitz???? sure in a pinch i would do it, but never for fun. I mean if you like friction burns on your crotch and shoulders, and burning holes in your gear, than ya go for it.... I practiced it once, and i couldnt decide between having my ass on fire, or all of my weight on my balls.