Possibly an error?

Not sure what you're talking about?

Well, the positioning of the pussy, and it's lenght, and the anus seem quite odd.

The vag changed places with the clit.

I am inclined to agree that this could be marked as error.

Her left thigh alone is as thick as her stomach.

Why is he sticking his fingers in her urethra?

dustyjo said:
Why is he sticking his fingers in her urethra?

1) Because he can.
2) Because this is Danbooru.
3) Because it goes along with the likely error of her vagina and urethra being switched.

Such perfection on the upper body and then this.
*sigh*

Maybe someday we'll have a heart breaking pool dedicated to errors, artifacts and lowres ruining otherwise great pictures.

dustyjo said:
Why is he sticking his fingers in her urethra?

Those are more likely a woman's hands.

Uncanny valley.

solarenemy said:
Her left thigh alone is as thick as her stomach.

I'll take the opportunity to digitally yell "THICK CHICK" for her left leg.

Cruentus said:

Those are more likely a woman's hands.

This is most likely a best guess that doesn't represent any kind of absolute truth in either the artist's intent, or the eye of the beholder, worth only the paper it's printed on.