People who have odd habits? What to do?

when we watch tv, if something or someone annoys her on there, for example, an annoying character or something, she gets all mad and is like, "I so am gonna fart in their faces." and since we have tivo, she will pause it and go in front of the TV and pull her pants down and fart and then laugh hysterically for 10 min or longer. Should I be worried? Thanks.