Mace - My fondness for round numbers means that sub 60 for 10 mile is probably my ultimate running goal. Sounds like it shouldn't be too much of a stretch for you.
Still on the subject of tights, I tend to prefer 3/4 length tights (worn without shorts). If it's really cold I'll also wear long socks or calf guards if I remember. I have some full length tights but the zip can rub the back of my ankle sometimes.
For cycling I have longs and shorts, though I don't do much cycling in cold weather these days. I also have some cycling briefs bought from aldi, recently. I've not yet found a reason to wear those out of doors.
For me the approach to my limit is preceded by a feeling of suffocation and shortly after the feeling of nausea. I've learned when to step back from the breathless regime and avoid the nauseous crash and burn situation in training.
This sort of thing, together with race reports involving vomiting or collapsing over the line, makes me think I don't try hard enough.
I experience pain whist running as a form of existential angst that is distinct from physical discomfort of muscular stress or breathing limitations. It's a classic edge -of-cliff dilemma in that the pain is a much to do with a fear that pushing harder will result in increased anguish.
DT - I think he was just using the conveniences, but didn't want to get wee wee on his trackie bottoms.