By holding a fart in, the gas gets reabsorbed and comes out elsewhere.
If you've ever doubted the age-old "better out than in" wisdom, then now is the time to stop.
While breaking wind may be the sort of thing you prefer to do without an audience, this isn't always practical or possible.
We're not suggesting you make a point of letting rip during a job interview or your gran's 90th birthday party, but holding a fart in could be doing you more harm than good.
In fact, by holding a fart in, there is a chance you may instead breathe it through your mouth instead.Yes, really!