What's Up With This Print Ad?

[Gangster Octopus]

I feel pretty dense, but I cannot see what the big deal about this ad is. I realize the person in the center is pahllic in nature, but is that it? Can someone fill me in?

[lno]

It's an ad for lubricant.

There are somewhat-large posts spaced evenly along the pier.

She's sitting where there would be another post.

I think she's been filled in already. Now, are you?

[Gangster Octopus]

Crikey! Now I got it.

[scout1222]

Originally posted by lno
I think she's been filled in already. Now, are you?

Tee hee hee! This is brilliant, lno.

[OpalCat]

...except that she's sitting behind where the post is, and possibly cross-legged. To me it doesn't look like she's sitting right on top... though I'm sure what the joke is.