Can boas expell sperm plugs when musking?

[LauraV]

My friend took her Cuban boa to be sexed, and while there it expelled, " this white stringy smelly stuff came out of her cloaca," I was told. Smelly stuff sounded like musk. She was told it was musk by the prober. But, although I've seen colubrids expell poo, urates, and fluids when musking, I've never seen stringy stuff? Sort of reminded me of sperm plugs, the way she described it. The prober she used has been wrong about sexing in the past (at least once), and I just wanted to make sure that these were not sperm plugs. I guess w/o a pic, we can never know for sure. But, if a boa can't release sperm plugs when musking, then he probalby sexed her correctly. The only other thing I could think is maybe unsolidified urates??
Wish I had a pic for you, but I wasn't even there to see it myself.
Sorry for the question, I have never seen a boa musk. I'm sure I'm missing out on a lot of fun. ;D
Thanks for any input.
Lori

[LauraV]

I just talked to her again...a wee bit more description.

There was a lot of the stringy stuff. Eric said that it looked like she might have had impacted glands, or something. So he squeezed them and a whole bunch more of the stuff came out. It didn't look like loose urates. Very skinny string, somewhat off-white and kinda clearish. Like the width of a piece of string.