Wow, thank you for all the responses. I should clarify that he does not want to cut it all off. Just a few inches. He is obsessed with this idea and esp. of putting his cock in it and cumming in it.
He swears he has never done this before. I wouldn't let him cut all my hair off and I don't think he wants to, we talked about it and agreed on a few inches but after reading some responses I wonder...
And again, no one is cutting all my hair off ever! lol