My mother never discussed shaving with me. When I was ready, I just grabbed an old fashioned razor and some soap and shaved my all of my legs and underarms.
I had a friend who was afraid to shave her legs, so we locked ourselves in our family bathroom and she sat on the edge of the tub. I soaped her up and shaved legs too.
When I went to cosmotology school, I used a straight razor to shave a balloon smeared with shaving cream. I never cut anyone or popped a balloon.
My mother always worked full time. I was in charge at home, watching three siblings and could pretty much do anything with my body without permission. ( pierced my ears, cut or color my hair or shave and buy tampons.