Introduction to the debate on whether gravity can clean your legs in the shower.

• The question of whether to wash legs in the shower has caused much controversy.
• A 2019 Twitter poll showed that 20% of over 600,000 respondents do not wash their legs.
• The debate includes assumptions about gender and cleanliness habits.

Explanation of the gravity wash hypothesis and gender poll results.

• The gravity wash hypothesis suggests soaps and shampoos clean legs as they run down the body.
• Poll results showed more women skip washing their legs compared to men.
• Theorist team is determined to test the hypothesis before the arrival of their new HR manager.

Chemistry expert Stephanie explains how soap cleans the body.

• Soap is a surfactant molecule with oily and watery sides that helps remove oil and dirt from the skin.
• The process of bathing is not very efficient, with water acting mostly as a carrier for soap.
• Showering can strip the skin of oils, often leading to the need for post-shower lotion.

The team prepares for the experiment with uniform dirt application and shower products.

• Participants wear shorts and short sleeves to allow for natural water and soap flow.
• A coffee scrub is used to uniformly dirty all participants' legs.
• The same soaps, shampoos, and conditions are used to maintain consistency.

Observations from the first round of shower testing with Amy and Sam.

• Coffee scrub sticks more to hairy legs than to shaved ones.
• Participants' shower habits, such as rotation and soap application, vary.
• Preliminary results show significant dirt removal by gravity alone.

Insights into the importance of shower technique for cleanliness.

• Different shower techniques result in varying degrees of soap distribution and dirt removal.
• The body's rotation under the shower is crucial for the water to wash away dirt.
• The effectiveness of gravity washing partly depends on individual shower practices.

Further testing with Stephanie and MatPat reveals more about shower habits.

• Personal shower stances, such as pivoting versus twirling, affect cleaning efficiency.
• Shampooing habits, like single versus double washing, alter the amount of soap running down the body.
• The experimenters find their own legs significantly clean from gravity washing.

A final test with Josiah to examine the effect of diagonal showerheads on gravity cleaning.

• Josiah tests gravity washing in a shower with a diagonal showerhead setup.
• The results show more dirt residue compared to the overhead rainfall showers.
• Shower type, specifically the angle of the showerhead, impacts gravity's ability to clean legs.

Final thoughts and recommendations following the leg washing experiment.

• The experiment concludes that gravity can effectively clean legs, especially with overhead showers.
• Diagonal showers may require manual washing due to uneven water flow.
• While gravity washing works, occasional manual scrubbing is advised for exfoliation and heavy soiling.