This was supposed to be a fixed thing, at least in the version of the game that was deleted, but that is no longer the case. Both male orc Snoppt and female Snopta behaved the same way in the test. Log of the events:

civilized <100%hp 100%m 100%mv 1600tnl (50.00%)>
l n
A black door sits at the top of a huge staircase against the north wall.
It seems to be twenty feet tall, clearly made for giants and other larger-
sized creatures. A canopy covers the staircase.
A huge black door is open.

civilized <100%hp 100%m 100%mv 1600tnl (50.00%)>
n
The stairs leading to the giant black door are far too massive for you to climb.

civilized <100%hp 100%m 100%mv 1600tnl (50.00%)>
quit
Awaiting the hour of reprisal, your time slips away...

Tremblefist: Snoppt the worthless whelp has arrived to do your bidding.

civilized <100%hp 100%m 100%mv 1600tnl (50.00%)>
l n
A black door sits at the top of a huge staircase against the north wall.
It seems to be twenty feet tall, clearly made for giants and other larger-
sized creatures. A canopy covers the staircase.
A huge black door is open.

civilized <100%hp 100%m 100%mv 1600tnl (50.00%)>
n
You grunt as you just manage to climb the massive staircase.

n/t