Well, This topic is a little old but I will try to comment.
Yes. You can.
First, I would suggest taking a small piece of duct tape and sticking it somewhere on your body to test for allergies. Take it off after a couple of hours and see how you are. If you are fine, then proceed.
Now, you can use duct tape. I have done it. I have a few things to remember.
It hurts if you have pubic hair. The hair may or may not come off, but it will hurt.
If you don't have hair, it still may hurt.
It can give you scrapes (minor, but it happened to me) if you have it on too long or positioned incorrectly.
It is really to your discression to how to use it, but be careful to start small with duct tape and get larger as you go.
It can make lines. It isn't the softest material.
Take it off in warm water. That way, your member and scrotum will already be softer. In a shower or bath.
If you pee with it on, you will have to wipe. (in certain positions)
I suggest not using it if you won't be dressed for a long time, or in public. This is heavy duty stuff were talking about.
Finally, it uses a lot of duct tape to tuck, even once. So be prepared to lose it quickly.
be sure to have your member in the right position before you tape. Getting it wrong can hurt and waster.
It is better to relax for this reason. The further back your tucked (which is attained from being soft) the less notice-able it is.
Hope it helped. Signing out. Bye now.