Bikeadventure

I am in need of some serious help. I bought two pairs of cycling pants recently and I can't even go on one ride without finding a tear on one of both of them at the crotch. Luckily I have a girlfriend who sees them up for me but they rip again on the very next ride. I've tried adjusting my saddle height and the position of the nose of the saddle both to absolutely no avail. I've tried swapping out the saddles on my bikes too, still no help. All the local bike shops are stumped too they say theyve never seen anything like it. Nothing else on other forums either, this seems to be a problem no one else is having but me. To make matters worse I'm on a tigtt budget so when the pants finally do give out for good, I'm not going to be able to get more. I am about ready to give up .oh and it happens with my regular clothes too, but to a slightly lesser extent. I am at wits end. Help!!!