Maybe you could live on Mars and help us all out. I'm not sexist, but if I hear a woman's voice on the radio I change it.
Why don't you like women's voices?
I was making a joke and you are taking it for real. I just meant that ...
It is disrespectful to tell a women to go and live on mars just because of their voice. If you do not like their voice then you are right for changing the channel, but there is no need to harp on the fact that you dislike their voice. Someone's voice is not really something they can control about themselves.
Are you a feminist?
It's wrong to judge people based on their sex. It doesn't matter if I am a feminist or not, but what matters is that people shouldn't make fun or ridicule a woman's voice just because they do not like it. I hope you'll reconsider your attitude towards the matter and be respectful towards all people, regardless of what they sound like.