I have never tried. Not sure I could aim that straight.
Mind you there are plenty of pi**ing competitions on here so I bet some of us are better than others
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I have suggested it to my wife and a couple of other girls including my daughter that like to fly even explaining the finer detail, but when they looked absolutely horrified at the idea, I gave it up completly and have had to promise never to mention it again.
I should add thats them doing the pi**ing, not me, in one of those contraption specially designed for the lady in your life I am told.
Mind you I will always remember taking my son on the flight to Manchester or some where like that when he was very young in the days they didnt have a loo on board - perhaps they still dont. Of course his first question was where is the loo Dad. he was equally horrified to be told there wasnt one. Rest assured the hostie was at pains to say she had had to deal with far far worse.
Hope you had a good trip Bose.