Or no penis at all
The idea of this bothers me. As does that of a "penis" made of forearm. The notion is horribly unsexy.
And I'm truly sorry if this is hurtful to anyone. I don't mean for it to be.
But, as DuMondeB points out, I guess I'm ultimately just a heterosexual, female mammal. All politics and feminist ideology aside.
I like kissing men and snuggling up to them and coming to realise that they've got one massive erection. It's silly, but I suspect I'm wired for it in a way that goes beyond my rational self. I'd be disappointed at a partner having to push the button for it to happen. And, stupid as I realise this is, I'd feel as though I'd somehow failed as a sexual partner if he didn't respond that way.
And, yes, I realise I'm outing myself as someone who's never had a sexual partner with ED. I have friends who have and have done my best to empathise and realised in the process that, yes, I'd be secretly disappointed.
I'm probably kind of a horrible individual for this but, to me, sex has ideally got to be somewhat primal. It's an individual preference. But then again, I think I get to have these when the other party literally gets to invade my physical body. Better make it worth my time!