Some people consider farts embarrassing or gross, but others find them funny. Whoopee cushions and fart machines mimic the sound of a fart, and many actors use them on set to ease tension and lighten the mood.
Artificial fart noises can also be made with a person's mouth or by a person placing her hand in her armpit and quickly moving her arm up and down.
Professional farters (also called flatulists) have been around for centuries. A 19th Century French man named Joseph Pujol is famous for his stage act, where he would blow out candles and play the flute with his farts.
