This one?

http://www.flyertalk.com/forum/briti...y-stomach.html

Is there any policy on how decent passengers should remain? I sat in 60J a couple of flights ago and I couldn't believe how many men wander around the plane with their pants gaping open, and how many start to get their "equipment" out before they enter the bathroom or are still putting it away on the way out! Yuck! It's one thing to loosen a button, quite another to put far too much on display.

If they did it on a bus they'd be on the sex offenders' register.