Jeans always stretch out in my experience. But I've never had a pair tight in the crotch -- does this area stretch too? I know it sounds stupid, as I've said I'm used to jeans stretching with wear. But the crotch has all that extra stitching for reinforcement and a metal zipper. Please advise. I'm short so loathe to give up on these just-bought jeans. So rare to find something that fits lenght-wise. Thank you!