This phenomenon is more than a reaction to eating badly or feeling low.
By turning their back on sexual labelling, they risk getting stranded in a no-man's-land with a handful of monks and nuns.
They'll be oddballs, losers and someone best avoided.
This explains why there's nothing that gets people so worked up as indifference to sex.
Now that 'asexuality' has been declared a legitimate sexual orientation by the New Scientist , anyone who admits that they are not turned on by anyone, anywhere, will be dragged kicking and screaming into the light, probed for hang-ups, and interrogated about secret pastimes.