These have been around a while, but they seem more than apt for this thread...
1. Don’t cut your hair. Ever. Long hair is always more attractive than short hair. One of the big reasons guys fear getting married is that married women always cut their hair, and by then you’re stuck with her.
I have had a beard for about 45 of the 51 years we've been married. About once every month or two, my wife will tell me it needs trimming. She will also tell me that she has never liked my beard, and she wishes I would shave it off,
"...after all, you didn't have it when we met, or I never would have dated you, and you're supposed to dress and groom yourself to please me, not yourself."
To which I invariably reply,
"When we met, and when we got married, your hair was down to the middle of your back. I would never have asked you out if you had your hair cut that short." Of course the part about never asking her out is a lie, but I'm just trying to make a point.
She then follows up with,
"Long hair is too much trouble to take care of, I don't have time to deal with that."
And I tell her that shaving every day is too much hassle, and I don't have time to deal with that, and anyway, she's supposed to groom herself to make me happy, and blah, blah, blah, because by this time, she has left the room angry.