There's no confirmation of his genitalia, you can presume he probably has the parts but they're effectively useless. He has, ahem, "creative jealousies", as Matt Hatton would put it.
The rape angle is pretty explicit/textual, he violently subdues Daniels and forcibly kisses her, not to mention killing Shaw to harvest her reproductive "parts" to create his perfect, rapey organism. Just look at the illustrations - fantasy or otherwise - he's sexually deranged.
