Wee stops are an interesting beast.
I think when road cycling temperature and road vibrations have an impact on when they come; there's also the case of what else are you drinking; it's night time, you're probably drinking coffee, coke, red bull or 2:1 with Caffeine in it at controls if not on the way too.
Caffeine is a diuretic so you're going to need to pee more.
The temperature is also lower which I certainly find results in more pee time needed, this is particularly a problem when you're trying to work on a bike out in a cold garage working on oily things without gloves and you're constantly having to dash into the house and Swarfega your hands before there's an accident.
And then you're bladder (and prostate) are being battered around by the saddle vibrations
During MTB 24hr rides I found I regularly stopped at the same place; on the Strathpuffer course (up to this year when they changed this section) there was a straight in the trees after the climb up from the "Bridge of Thighs"; think I stopped there 4 laps in a row one year.
At Nevis Range during Relentless24 I would always find myself stopping at the bottom of the Haggis Trap; almost like my bladder had some muscle memory; fast descent into slow rocky section, better empty!
I stuck to my 1.5L from my bottles per 100km baseline without trying to; but I had 3 cans of Red Bull during the second night (I had accidentally used one of the 2 packs of 2:1 with Caffeine I had packed during the day). So I was drinking more than normal, while adding a Diuretic in sub-zero temperatures.
However even just being a bit more regimented at the controls at taking 30m instead of 45m ish at all but Gretna I'd have had another hour and a half to play with. Take out the puncture and that's 2 hours, so "would have had" over 4 hours in hand at the end. But then if I had that I could have taken 2 hours sleep at gretna instead of 1 hour, wouldn't have needed the Shap bus shelter sleep; if I'd eaten more at Gretna I wouldn't have had the 20m stop at Auk, and so on; it all built up!
Lots of little things to improve in my time management which I'll need on longer rides so I can get a bit more sleep in.
