hmm mod I didnt see a link to other thread and I am cruisn through so please move this if need be.
I am thinking its summer time right? So I would let your child have his mohawk during the summer and get it out of his system. i fhe does it now he will not feel the need to do it as an adult. As children they learn way faster when people move away from them because of how they look. Your ex is right do not cut his hair until he is breaking down crying he wants it done.
lets get it out of his system while its still summer time. And usually they cut mohawks now so when it grows out and parted down the middle it will look like a bowl cut and they can spike it on the weekends and look normal during the week so not to disturb or disrupt school or what not.
Ooh fount the other one sorry

here the link for other folks
Mow Hawk on a 7 year old?