Wikipedia talks about the sweatglands as an orifice as well. So countless (figure of speach) I'd say.
Sexual beings may talk about three (five if you count the ears).

Dens

Interesting.
I guess it's hard to penetrate a sweat gland.

penetrating sweat glands

Would it hurt to at least give it a try? It possibly would.

I'm fixing a hole where the rain gets in,
and stops my mind from wondering,
where it will go

Suddenly "acupuncture" is starting to have a sexual notion...

Arnon

For some men the ears are equally hard to penetrate

Sander

I believe, Sander, that if you want to penetrate any other orifices, you'll find you have to penetrate the ears first.

For the sake of simplicity, let us say, a woman has one orifice more than a man.

Yesterday I met Monica Callens.
I imagine ears are not penetrable but you can cum in them.

Could someone enlighten me about orifices eleven and twelve?

Oscar

I will send you Mulisch's novel.

Sander

I used to run into women who enjoyed licking ears and nibbling on men's ears.

Coincidentally I saw Quills (the movie) today (I will be playing the play in may, I will invite you all later). In this movie the Marquis writes that he has no problem creating new orifices and penetrate those. When I get in the mood I too talk about taking a knife and creating new orifices. Maybe de Sade had some subconscious influence on me.

Arnon

Thank you. I will read Mr Mulisch's novel and report to the readers of this blog.

Oscar

Johannes is going to send you a copy of Mulisch's novel.

I hope Johannes doesn't buy one. I have thee (free) copies at home.

Dens

Are you a friend of Mr Mulisch?

copies were spread freely on the Antwerp BoekenBeurs. I went a couple of days, so I have a couple of books.

Dens

Thanks for the offer but I have bought a copy.
Today I am going to the post office.