What is the trick to riding these without your groin area not killing you? I,m a guy! Do you where a cup or what?
I shouldn’t be answering this 
as I don’t have the same problem but try these, this question is always quite entertaining but you will find some good information within the threads too:
http://www.unicyclist.com/forums/showthread.php?t=84017&highlight=balls
http://www.unicyclist.com/forums/showthread.php?t=83157&highlight=balls
http://www.unicyclist.com/forums/showthread.php?t=78532&highlight=balls
i will answer your question fully: for distance, buy bike shorts and/or a better saddle. also it helps not to sit on your balls. when you start riding, just reach down there and pull 'em out front where they can be free.
Welcome to unicycling national76, and welcome to the forums.
Tha’s one more of us, and one less of them.
The best answers to your question is cycle-shorts and conditioning.
Your boohinney will get used to the pressure and you’ll get used to various way of keeping Frankie and the Twins out of harms way.
What kind of riding do you do?
Welcome!
Keep on riding, and eventually your cojones will take the hint and wither away. Problem solved. 
I find tights all right for my 29er, which I sort of jump onto. On the small 20 inch I use the rollback mount. Then I find loose clothes better, and I use the tip I got here when I first started:
- Assuming you start with your right foot on the pedal…
- Lift the fragile cargo up and to the left. Place the seat on the right.
- As you start cycling and straighten up, the load redistributes itself to the middle.
You may want to camouflage the crotch grab with a little MJ or Madonna impersonation…
In my experience riding is not a problem, only starting is. The better I get at mounting, the less of a problem I have.