behemoth

I can’t seem to chose the option to have both behemoths when one is a herm. I can choose either of them, no problem, but not both. Is that normal ? Maybe I missed something ? Or is there some minimum size requirement I am not meeting ? Thank you in advance for your answers.

As the title mentions above, even though in the codex it says that behemoths should be able to take up to 5 feet or 60 inches worth of cock, the scenes themselves say that Steele's cocks are too big to fit, even if they're at the size of 40 and above inches. 30 inches fits for the females...