How do some women escape this?

Today my girlfriend learned the apparently foreign concept of the weigh-in ritual.

Me: "Oh goddamit! I weigh more after peeing than before! (141.6, 141.0, respectively) That almost never happens! Well, I'll weigh again... Gotta step on and off again, wait for the cycle to resent itself, or else it'll just get stuck in a rut giving you the same weight over and over again... Just gotta hope the second one was a fluke instead of the first... Okay, now I just weigh the same amount I did the first time... (141.0). Just one more time... ugh, the same. Okay I give up for now, it is just a mid day weigh in... You see why I have to get up an extra 10 minutes earlier for work every day?"