As a man who also has male friends I have never heard any heterosexual man suggest a woman cut her hair.
Having said that it's possible to meet a woman that already has short hair and looks great but most men want their women to maintain the look that attracted them to her in the first place.
I don't believe you can change a person's preferences just because they love you. If for example someone is not attracted to red heads I don't believe that will change just because (you) decide to dye (your) hair red. That goes for a lot of other things as well.
Naturally each of us is entitled to do whatever we want with our body. However if you knew your spouse disliked something and you (chose) to do it anyway I imagine it sends them a subliminal message at the very least. You don't get to control their reactions.
“While we are free to choose our actions, we are not free to choose the consequences of our actions” – Stephen R. Covey
It's usually the woman who gets tired of her own hairstyle or her girlfriends point out some celebrity who recently cut their hair and thought it was cute. Most guys want a woman who is their opposite. Not many of them chase after women with a "boy cut" hairstyle unless she has some other assets that more than make up for it.