Anal Phenomenon

Alright, well I had something very strange happen regarding my anal region. This has not happened recently but I have constantly wondered about it since.

I used to get bladder infections a lot. Taking a hot bath would relieve the pain, and other methods discovered for relieving the pain was self-gratification and so on.

I also discovered that fingering the edge of the anus would distract from the pain as well. We're not talking about full deep fingering, just slightly. There were rare times that this would actually stimulate waves of pleasure. I assumed that this would be a form of self-gratification.

The odd phenomenon that followed was that after a minute or so of this, I became overwhelmed with pleasure, my body contracted and a very very strange clear substance was expelled from the anal cavity. The substance was very very clear, I could barely see it in the water, that is how clear it was. It was in the form of short strips. For lack of any other way to describe the shape or size, about the size and shape of a 3rd of a pencil in length. About the same as a pencil in girth. I would save there were several of these. 4 maybe? 5?

They were very very slimy slippery. They did not mix in with the water like what would happen when you mix too substances together. They were slimy and slippery enough that I had a very hard time trying to get a hold of one to bring it closer for inspection. I could not grip it because it was too slippery. Maybe this is because there were submerged in water, and would have a different texture if dry?

Can one orgasm from the anal cavity? I have no idea what this is. I've considered maybe they were parasites of some kind but it didn't seem like it to me. I seemed healthy is most other respects aside from the bladder infections. Any explanations, ideas, theories, are welcome to help me explain this phenomenon. Thanks.