Yes, for about the tenth time in a row, I’ve had to retire a pair of jeans because a hole has developed right in the crotchal area. I don’t get it. Out of all the places where jeans could wear out, why does it always choose THAT spot?? I could deal with a hole in the knee. Or the thigh. Or even the butt, if it’s positioned quite right. But no.
I’m always left with acres of unspoiled, perfectly useable denim, all going to waste because of the crotch hole.
Just sew it up. Or, reinforce it when you first buy the pants. If you can’t sew, or have no friends who can help out, take them to an alterations place. They’ll reinforce the seams or put in a layer of interfacing and fabric to wear through first.
I had that problem, too, until I stopped wearing jeans. I lost a lot of weight, and I HATE buying jeans. HATE HATE HATE!!! I mean, regular clothes shopping is ok, because you’re looking for fun stuff. But jeans-shopping. . . so boring! So painful! So self-esteem-ruining!
So I switched to skirts and yoga pants, not that this is probably a feasable option for the OP.
I have this problem with all my pants but now I know what to do about it. Get some of this stuff and use one of your old pairs as patching material. Next time when your jeans start getting thin in the crotch, apply the glue and a patch. Problem solved! Until your jeans start looking like a patchwork quit, anyway.