Thank you Donny.No. I don't think you can use "expire" in a passive form like that: it certainly doesn't work for me.
That all sounds reasonable to me, yes.So, I can say that vouchers expire (but not that vouchers get expired).
And I cannot say that women expire quickly unless I mean they die quickly. I guess I would have to use have a shorter shelf-life as velsiarius suggested for my context above.
Is that right?