A point they are both wrong about, there is a reason women's razors cost more. Whats keeping her from buy Men's Razors if the are 5 quid cheaper? Because she would cut the fuck out of pits and legs if she used a mans razor, but conveniently forgets this and assumes the production costs are equal.
I can nick myself with my mach 3 sometimes if an ingrown hair pops on my melon, (it can happen, even with the bald fucks) and if I shave more frequently than every 3rd day on my face. Sensitive skin, like a baby's ass. Also, gets more likely the more use the blade gets.
Sack gets shorn with a Whal clippers, I don't go full shaven faggot down there. Rarely an issue as a result.