Why do we not have 'underwear' for armpits?

As an adult, the main thing my regular underwear/boxers deal with is sweat. I arguably get more sweaty (and sometimes smelly) in my armpits. How come we don't have some innovative creep out there inventing the 'pit-pants'?

Update#1:

  1. I pat myself on the back for asking a stupid question, based on the very rational answers I have received below
  2. I am disappointed in the very rational nature of the answers. I am aware of the tshirt etc solution, but I was looking for some stupid minds to come along with me while we invent a more stupid little triangular 'armpit band' that one can wear.
reddit.com
u/Appropriate_Yak_745 — 2 months ago