My manager told me it looked wrong that I got on my knees ??

So today at work my manager. Told me to clean my register and so I bend down and got on my knees to clean the register. And she was like “don’t get on your knees you’re a girl” 💀I’m confused in why she told me that. To not get on my knees because I’m a girl.. I was just cleaning and got on my knees to clean what did she meant lol.