personally I always enjoy making some effort before eating. On the other hand, the waiters have enjoyed my puzzled look before they decided to explain to me how it works.
We have arrived to the airport at 10 am, it was of one terminal in size. We were all crammed into one line waiting to stamp our passports, my bladder was willing to explode under the effect of the 3 bottles of wine I had onboard, waiting till we landed was not a good idea. I had to cheat and take the advantage of the amount of non-chalant people bundled together and managed my way through half of the line, signalling to the other generous half that "I had to go”.