A stiff bike is an efficient bike, but not a comfortable one.
I once rode in the Gong Ride (Sydney to Wollongong) and, determined to set my bike up as efficiently as possible, pumped my tyres up to 120 PSI. The bike felt incredibly fast ... but my testicles went numb.
1. Wear cycling shorts and pull your boys up so that you're not sitting on them when you ride.
2. Don't put so much weight on the saddle. The saddle is not a seat, it's meant as an extra point of control to lean the frame. Put your weight on the pedals. Also, is the saddle at the correct height?
I ride tires at 115 PSI daily and have never had issues with numbness anywhere on my body.
I once rode in the Gong Ride (Sydney to Wollongong) and, determined to set my bike up as efficiently as possible, pumped my tyres up to 120 PSI. The bike felt incredibly fast ... but my testicles went numb.