All women lie about their weight!
I took a young woman from my office flying on a warm day, and tactfully asked her just to discreetly write her weight down so I could do a 'weight and balance' the night before. With hindsight we were well over max weight on take off;initially I had trouble taxiing in a straight line (I thought I had a flat tyre!)and the stall horn squeaked on climb out. Fortunately I had located to a long hard runway and optimized the fuel load.
With hindsight, if the engine had just run sick for a moment, we would have been in deep trouble, with a stall/spin accident looming large. As it happens, we had a very sociable flight, but I emerged with a few more gray hairs and a lot more cynical.