I think a lot has to do with how much hair you have. I myself have gone smooth the past year. Started shaving my dick, then balls, then little by little the area above my dick. I never said anything to my wife, nor did say a thing to me. But I notice the hair around her pussy is thinning also. I like it.

The hair on my dick kept getting more and more. Wouldn't make for sucking fun.
She is happy, and I'm happy and we are both smooth.