Taking clothes off with one arm

I have always been hard wearing on my clothes - like most people I wear the same stuff over and over again.  Jeans and t shirts fall to pieces within 3 or 4 years.  Being able to use only my left arm means that the stress on clothes is quite specific.  My jumpers have little holes just below the label on the back where the threads have worn thin.  This is the place my left hand grabs to yank jumpers over my head.

Shirts and jumpers end up with a patch on the left elbow.  I often steady my hand by resting my elbow on flat surfaces.  The newest area of weakness is on the seam at the back of my knickers.  I had a look through my undies draw this morning and found 4 pairs had suffered the same fate.  The seam has detached itself from the rest of the material.  I thought it was a manufacturing fault until 10 minutes ago.  I stood up from the sofa and my jeans were sagging slightly so I hooked my fingers under the waist band at the small of my back and hitched them up.  This rather unsophisticated and slovenly adjustment was accompanied by the sound of ripping material.  Another pair bites the dust.