The world's oldest recorded joke is a fart joke, from 1900 BC, so I guess they will always be with us.
Add some advertising students to the mix, and you get this campaign from Cuca Escola de Criativos, in Brazil (via AoTW):
Tagline: "Life is hard. Prepare your stomach." It's for an antacid.
Cute campaign, kids. It's a gas.