I love them. There, I said it. 
Finally dropped enough weight to fit into my old Castelli 3/4’s again, and got a pleasant surprise - the extra compression over the knees really helped me on a couple of hard efforts this weekend. No need to tape! Wasn’t important in my 30’s, but my 50+ knees really appreciated the built-in support.
Nice. Never worn knickers or even leg warmers but I love the idea of some bonus knee support.
No idea what you mean by knickers but I’m guessing it’s not ladies underwear 
Cue British schoolboy humour… 
Lost in translation.
English can be a foreign language even for those who speak it natively.
I can neither confirm nor deny wearing ladies underwear.
If it’s cold enough to require anything other than shorts then you’ll find me inside. In shorts. 
Before I got an indoor trainer, I used to ride outside until the temperature reached between 35-40 degrees Fahrenheit.
Can confirm I will ride outside sub-freezing. Only surface conditions are limiters. Layers are your friend.
My problem is mostly my hands and feet.
I used to run outside in the winter even when it was 25-30F. Sometimes my hands hurt, but I would wear 2 pairs of gloves, 3 layers of shirts and jackets, a knit had, shorts and pants and that was usually enough.
But cycling is a totally different animal, and I don’t have enough cold weather gear. None of my 10 pairs of running gloves seem to be windproof enough for cycling. One time I was out riding when it was only 50F and my hands went completely numb and were so painful after 10-15 minutes that I could barely grip the bars and had to turn around and come home. Took 10-15 minutes for my hands to warm up. It was SOOO painful and took forever as the circulation came back.
For my first sprint triathlon, the water temperature was 56. My feet went numb. My hand were cold, but okay because the air temp was 60-70. I finally got feeling back in my feet with 1.5km left in the before, shortly before the finish. 
Aside from the over-the-knee, 3/4 cycling bibs/shorts, I’d always associated “knickers” with young English schoolboys, Bertie Wooster, and pro golfers with questionable taste in pants. But yes, I acknowledge that in modern British slang they refer to…something else.
“Indeed, in many respects, she was quite English, and was an excellent example of the fact that we have really everything in common with America nowadays, except, of course, language.”
George Bernard Shaw, The Canterville Ghost
Or as Winston Churchill was supposed to have said:
The United States and England have a common culture divided by a common language.
Is this how you look in your knickers?
About knickers and English people understanding each other - From the Graham Norton show.
The whole clip is funny, but the relevant part starts at 1:20.
Don’t tempt me!
I like it - keep your cross-dressing for the open road.
Windproof lobster claw mitts with a silk or wool pair as liners. My hands have never been cold since. No matter how cold it gets.
It’s not slang. And it’s not modern.
I will defer to your expertise.
Nothing better than a sunny winter morning ride!
