I don't have a SO, but years ago when I lived at home I used to steal my brothers razor. Man, did he get mad!!! It wasn't electric, it was the kind that you buy those flat razor blades for and use a shaving soap.
Then when I was living with a guy I would sometimes use his razor. He didn't seem to notice, LOL
Now I don't shave. I use body sugaring. It's much better and when the hair grows out because it's not cut off at the thick part of the hair, and the hair is growing out with a nice new pointy tip, there is no razor stubble. Plus when you remove the hair from the root you get weeks and weeks of being hair free
Bikini, legs, under arms, brows, toes, arms and those awful chin hairs that we are plagued with as we get older... all gone with body sugar