I've had dealings with this beer fairy myself Lettie on numerous occasions. Usually manages to sneak up on me round about the end of the 3rd pint of lager. Thought I might have built up an immunity to it's invasive actions due to age and experience, but the little blighter still seems to find a way through. :
Have also had experience of "Beer Fairy by Proxy". At one stage having 3 sons at home between 18 - 24. It had the effect of turning normally rational young men into jibbering idiots, and followed them into their bedroom causing similar symptoms as you describe X 3.
If you here of any medical breakthroughs to tackle this syndrome please let me know ASAP.
No sign of the shoe yet, but will keep my eyes open for you! ;D