RoyP wrote: ".....happy Christmas thingy to y'all"
Did you say "y'all"?!
Obviously you have come to us from Glasgow via Dallas/Fort Worth - an unfortunate itinerary.
Now, about playing when "pished". A drink (or two) before playing the theremin will give you courage and diminish your inhibitions and stage fright, but this is dangerous because it will also diminish your control. There is no musical instrument for which more control of oneself is required than the theremin.
All this may create the impression that you are playing better, when in fact you may not be. Your playing just seems better because it is without the nervousness that plagues so many performers, even in the privacy of their own living rooms.
Thereminists have good reason to be nervous because apart from the fact that the instrument is humongously difficult to play well, we are acoustically in the dark. The use of an audio pitch preview can offset some of the uncertainty of playing, and it is not as hard on the liver as a shot of scotch whiskey.
Several years ago, I recorded a theremin version of Robert Burns' wonderful song, AE FOND KISS. It never saw the light of day because without Burns' extraordinary verse it did not touch the heart. This is often the case with simple but familiar songs that require their words in order to have an impact. Who is Eddi Reader? I just watched her version of AE FOND KISS on YT. She makes the most amazing hand gestures (which I love to watch).......she should play the theremin!