Hmm... A chair kind of works for the purpose. If you sit down, and get both feet off the ground, then you can indeed pull your pants up both legs simultaneousl

Hmm... A chair kind of works for the purpose. If you sit down, and get both feet off the ground, then you can indeed pull your pants up both legs simultaneously, most of the way, until the waistband reaches the point where butt meets chair. Then you have to stand back up to raise them the rest of the way. But then you might end up standing on the bottom part of the pant legs (shorts would work better here), in which case you'd probably stand on one leg to raise one side, then stand on the other leg to raise the other side; that can be avoided with some effort and pulling them up as far as possible while sitting, but... Overall, the process seems mildly uncomfortable, and not faster or better than putting the pants on one leg at a time. Victory is only achieved when the new, both-legs-at-once approach is clearly better.