Paul, I do agree but I found something interesting.
I have a bunch of different sizes & styles of rubbber hose hanging on the garage wall about 5 feet away from the Challenger.
Tonight, I was looking at the rubber hose that I used on the PVC line (that was sweating) and then looked over at my wall to find the longer piece that I cut it from. Out of all the pieces (apx 20 or so) hanging on the wall, two pieces have the sweat (including the piece used on the PCV hose)and the rest do not. Both pieces are "heater hose" and they were both drenched with sweat. All of the other styles were dry as a bone. It appears that the type of rubber might have had something to do with the sweat.