Toilet Seat

Yesterday I had a discussion about whether guys should leave the toilet seat down after use.  Coincidentally I happened to watch a South Park episode that mentioned the same dilemma.  Neither situations had a solution so I decided to write a blog post.  We'll start off by listing all possible scenarios (since they're pretty limited).

1. Assuming no adjustments to toilet seat after use:
• For Women:
• Best Pee scenario: 0 adjustments (toilet seat is down = no change)
• Worst Pee scenario: 1 adjustment (toilet seat from up to down)
• Best Poo scenario: 0 adjustments (toilet seat is down = no change)
• Worst Poo scenario: 1 adjustment (toilet seat from up to down)
  Total Number of adjustments for scenarios: 2
• For Men:
• Best Pee scenario: 0 adjustments (toilet seat is up = no change)
• Worst Pee scenario: 1 adjustment (toilet seat from down to up)
• Best Poo scenario: 0 adjustment (toilet seat is down = no change)
• Worst Poo scenario: 1 adjustment (toilet seat from up to down)
  Total Number of adjustments for scenarios: 2
2. Assuming men put the toilet seat down after each use:
• For Women:
• Best Pee scenario: 0 adjustments (toilet seat is down = no change)
• Worst Pee scenario: 0 adjustment (toilet seat is down = no change)
• Best Poo scenario: 0 adjustments (toilet seat is down = no change)
• Worst Poo scenario: 0 adjustment (toilet seat is down = no change)
• Total Number of adjustments for scenarios: 0
  
• For Men:
• Best Pee scenario: 3 adjustments (toilet seat from down to up and back down)
• Worst Pee scenario: 3 adjustment (toilet seat from down to up and back down)
• Best Poo scenario: 0 adjustment (toilet seat is down = no change)
• Worst Poo scenario: 0 adjustment (toilet seat is down = no change)
• Total Number of adjustments for scenarios: 6
3. Therefore, the only way to be fair (and consequently the most inefficient method) is to have the entire lid closed after each use regardless of gender:

• For Women:
• Best Pee scenario: 2 adjustments (open lid, close lid)
• Worst Pee scenario: 2 adjustment (open lid, close lid)
• Best Poo scenario: 2 adjustments (open lid, close lid)
• Worst Poo scenario: 2 adjustment (open lid, close lid)
• Total Number of adjustments for scenarios: 8
  
• For Men:
• Best Pee scenario: 2 adjustments (open lid, close lid)
• Worst Pee scenario: 2 adjustment (open lid, close lid)
• Best Poo scenario: 2 adjustment (open lid, close lid)
• Worst Poo scenario: 2 adjustment (open lid, close lid)
• Total Number of adjustments for scenarios: 8



Note: None of these methods take into account frequency of use (i.e. more peeing than pooping).  If given say a 2:1 ratio of peeing to pooping, then the most energy saving seating would be with toilet seat down (although not necessarily fairer).