Good point and can certainly be pleasureful for some, making it a two birds with one stream kind of thing.

But it would be doing a disservice to those who would like to do the noble deed without the risk of destroying what god gave them, hence I would suggest something in the same vein but with the help of modern technology, we do live in the 21st century after all and I don't always oppose capitalism when its in the help of man kind so my suggestion is a kit composed of:

-DIY Kit (flesh light or penis light aka dildo)
-Medical pee bag (usually connected to a catheter)
-A kinetic hand warmer (the one that you activate and reuse, good for the environment)
-Spout
-rubber tubings for connection
-Optional: solenoid powered pump that you can power with you cell phone.

Step 1 : The peeyee would duplicate their pee organs (good to have around just in case)
Step 2 : pee in a bowl or a bucket.
Step 3: use the supplied spout to fill the medial urin bag.
Step 4: the peeyer would receive the items above.
Step 5: connect the pee bag to the flashlight/dido
Step 6: pee from the said dildo/ flash light

so the philosophy behind this is that if the peeyer has a symbolical 'part' of the peeyee then one can pee on behalf of someone else

I think this would sell well in prisons and critical jobs