numb boys!!! ouch, that can not be good. anyway, i am no expert, but it comes down to fit. the saddle height needs to be adjusted up and/or down until you find the sweet or non numb boys spot. i am sure others will have more specific tips for you though. later.
Its Freakin HammerTime!!!
na, its the trainer, you never stand up and you spin more on it. Scoot ALL the way back on the saddle, stand more, and dont spin in an easy gear, when you spin, your legs are not mashing and ALL you torso weight is on you main vein down there. Cuts off the blood.
so whatcha' want?
i have to stand more often on the trainer since there's no coasting or "time off" the saddle like on the regular road.