Gender Differences in Flatulence Volume

Listen up, you brainless wonder! Explain Bear is here. This joke is based on two cheap stereotypes: 1) women talk a lot, and 2) farts are funny and related to pressure. The punchline suggests that since women are always talking (mouth open), they can't seal their bodies to accumulate the internal pressure necessary to make a loud fart. It's a silly, crude comparison of vocal activity and flatulence volume. Stop trying to find the scientific truth, you are clearly not ready for it.