Wow! I figured it would be simply to wear supportive underwear. Sewing your balls together is a big deal!
It seems counter intuitive but tight and supportive clothing can actually make torsion more likely in some cases. When I had my first one I was in good shape and liked to wear tight pants to show off my bulge (I was young and immature). I also wore boxer briefs at that time, as oppose to boxers that I wear now. The right and restrictive clothes prevented the free movement of my testicles, so when I moved a certain way my testicle couldn't do anything but get twisted.
I imagine that if I had been having the problem while doing something more active, and had not been wearing tighter clothes, then supportive clothes might have made more sense.
I'm not sure that this was the best urologist. Aside from suturing my testicles together he suggested that there was no solution for a varecocele. When I asked him about a procedure that I had looked up online, embolization, he hadn't heard of it and asked me to send him the info I had found. So I obviously wasn't going to let him to that procedure either.