I'm not trying to turn this into an argument, I was only trying to clear up any misconceptions of stretch denim.
Most of my jeans are 2% stretch, because I prefer it that way. There aren't many jeans made for men with elastane blend as high as 18% to my knowledge, usually that's more common for women's jeans. And I'm not saying that relates in any way to gender or looking manly or girly, just what's more common for cotton blends in jeans as a whole. They do it that way because most jeans for women are very skinny, or are jeggings (which are usually around 20% elastane or more).
I'm also not saying that jeans with some elastane in them don't stretch over time. All cotton stretches over time. But it's going to be very minimal compared to 100% cotton denim. The more stretch to the denim, the more it will keep it's shape. That's the whole point. The stretch allows it to stretch to fit your body and snap back to original shape when you're not wearing them. Just like the way a rubber band would work. Pure cotton on the other hand can only shrink back when you wash it, otherwise it just grows and stretches out over time as much as it needs to or can before tearing. They don't have the same "give".
If you like the jeans, great. I'm only trying to help. And if you disagree with my opinion of the fit, then that's totally fine. I was just being honest. If you like it, you can rock it. That's what style is all about.