I completely agree and understand your point, as I had your same exact thoughts. However, I did make notes on some things, which brought myself to this conclusion.
It started when I had put them together around midnight. Hours went by, and they still were connected. Since they were still together before I went to bed, as I could not wait up any longer, I made observations on their positions in the cage, as where certain parts of their body was, what part and pattern of their bodies were touching each other, what did the aspen look like around them, etc.. I did this because I wanted to see if it was possible to tell with their positioning, if they would have been disconnected, and then reconnected, after I got up. After all, there would be some noticeable difference most likely if they did.
After I successfully made some intense mental notes, I went to bed, and after I woke up, they were still in the same position as I had left them. I then got a little worried, and touched them lightly to see if they would “ disengage “, as I really didn’t want to leave them alone all day while I was at work. After doing so, they were pretty solid in their stance of remaining still and connected and they refused to budge overall. The male was obviously loving life at that moment..haha!!
Then, I made more mental notes and observations, as to their positioning in the cage, like I did 6 hours earlier, and went to work.
After I got home, there they were, and they had barely changed anything at all in their positioning. Everything was the same as I left them.
Then, they remained locked for another 3/12 hours or so until finally disengaging. This was between midnight and 1 a.m. the following day from when they first started.
So, because of the fact they remained virtually unchanged from the observations I made every time, I simply concluded that they had remained together. After all, like I have stated, nothing in their positions had changed. If so, there would have most likely been some sort of difference somewhat, in either where certain parts of their bodies layed, what part of the cage they were in, aspen being moved around, etc.. The chance that they stopped breeding, crawled back together, connected again, and assembled exactly how they were laying in the exact same positions as when I last had seen them, and not disturbing or changing any of the aspen around them, was very slim. The whole experience was a trip to say the least. I, of course, always kept an open mind that there was some chance they may have separated, but again, my observations only led me back to the conclusion I gathered.
A buddy of mine has noticed similar breeding experiences with some of his prairie kings.
Most of the breedings I witnessed back then were ranging anywhere from 3 to 6 hours, so this really long copulation was quite different.
Anyways, there you have it, the whole scenario.
Take care!
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Genesis 1:1