Narcolepsy
OED - A condition characterised by a tendency to fall asleep in circumstances conducive to relaxation
The Chaps find this an essential skill during their brief periods of non-leisure, or wo** as it is rather coarsely termed
It can be brought on by even the briefest of exposure to: Tories, Daily Mail readers, Republicans, Golf fans, American television, the casually dressed &cet.
Narcolepsy is to be warmly welcomed as an alternative to any of the above