May be some males will change their "Sex"?? I don't know the exact word for this but I have heard that some men and women change their Sex.
if there are no women they life would be plain boring although you will surely think that life would just cease i think not human being will just adapt and mutate if you ask me maybe men can bear a child or something maybe we will be able to reproduce by ourselves creating our own egg cells LOL
If there were no women in the world, I'd have a crapload more cash in my pocket right now that's for sure