Well, I'm not such a big expert on it either, but in order to paint the cards I had to learn a few things about them... been a long time though.

Alright, now... every one of the Major Arcana, the so called "big secrets" has a roman number assigned to it. These are the trump cards. There are also the minors.. more like "colors" in other decks... coins, swords, sticks and cups. I never worked on those.

Ok, back to the question... I don't remember if it was part of the "generally accepted knowledge" or... (most likely) C.G.Jung who related the roman numbers "I" and "II" to male and female by the appearance of their genitalia.

Now, I don't say, I see exactly that in your photo, but the legs (II) and the shadow in between (I) somehow resemble the theme, I thought.

Not looking alike... just a similar visual pattern ;-)