For me the issue is that some men expect this. They don't accept that some women don't want to shave, or wax, or even trim. To them it's a minor thing that shouldn't be a big deal. The fact is, it is. It's a personal preference, like a beard or mustache is for a guy.
I do trim, but hubby doesn't care either way. I could have dreadlocks down there and it would be fine with him. What I do with my body is my choice. He loves me for who I am, not for what I look like or how I maintain the hair on my body.