<human>: Throughout my life, I've been told by multiple people that my most interesting feature is my hair. At the moment it has grown to the length of my belly button. I've decided to cut it off to collar-bone length in favour of donating it. This donation will eventually create part of a wig for a child undergoing chemotherapy. 

Initially, everyone took my plan as a surprise. After my explanation they often understand and respect my decision. The only person who has consistently rejected this plan is my boyfriend. 

At first he used his conservative family as an excuse "because they aren't used to women with short hair." I clarified that it wouldn't be *that* short, and pointed out that both his mother and grandmother sport short haircuts! To alleviate his problem with this, I've sent him images of the new style that I am going for only to have him reject those suggestions too. 

I've already given him the "I don't understand why you won't support me, donating for charity" talk. His answers don't vary, "because you're beautiful with long hair," and he'll try diffusing the topic through jokes.

Right now I'm at the other side of the world with my parents. I'll be doing the donation regardless of his support because it's cheaper to cut hair here. Last night I brought the topic up again with no progress on his part. In my last message to him I mentioned that:

"You're feeding the stereotype that beauty is more important than somebody else's happiness."

What's another method I can take to approach him with this topic? It almost seems kind of trivial to split with him because of something like this.

Could you distill the essence of the text into 1-3 sentences?
<bot>: Boyfriend doesn't want me donating my hair for charity, in favour of aesthetics. What's another approach I can take with him?