Seems like it would help keep the shorts from getting stinky.

Edit: i have learned a lot about friction here. Thanks!

    • sem@piefed.blahaj.zoneOP
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      2 hours ago

      I have lots of underwear, only few bike shorts.

      I wear underwear to protect clothes.

      I don’t wear underwear under underwear because i don’t need to protect it.

      So it must be a different reason from that.