[grahamplace]

If your goal is to minimize pathogens transferred from seat to hand, you can think of the man's second seat manipulation as "zero cost" in the sense that their hand is already contaminated and they'll need to wash thoroughly

Man 2x, Woman 0x = 1 "contamination" cost incurred Man 1x, Woman 1x = 2 "contamination" cost incurred

[nsxwolf]

This is an interesting view. Like anything else it's important to establish what the goals actually are.