What about trying on underwear over the underwear you have on?
When would you ever need to try it on, anyways? There’s always a size range of the underwear, and you’re not going to destroy anything by being a size off of what you should get, right? 
Not to mention that men’s sizes are really straight forward. My pants are size 36/36. I’m 36 inches around my waist and my inseam is 36 inches. Guess what size underwear I wear? 36!
Zebra ,
You have cracked the code.
Stay where you are, we’ll be by to interview you later.
Inspector 12.
Geez, I wish my waist & inseam were still the same. 
Staying on topic: Who the hell would try on underwear before buying??
- Resealable underwear packs
- Big profits
I just bought some socks in a “resealable” bag last week. The only problem was that you would have to destroy the part above the seal. :smack:
I cut the whole thing open below the seal with scissors. Take THAT stupid packaging!
Wow, I thought my luggage had a lot of pockets, but it sure doesn’t have one for photos of really good looking guys who are wearing my undies with me when I travel.