What Mei says in the fourth panel is kind of inspired by my wife.  Just as I am confused by some of her habits (none of which I shall mention here if I want to live through the night), she is confounded by why I drink milk out of the carton, how I can shoot hoops for three hours straight but tire out after an hour of shopping, and why I refuse to lotion up, among other things.  I guess it works both ways.