My cat over the years has developed a worsening habit of depositing small amounts of poop whenever he sits down somewhere, can someone help me?

Okay, so he doesn’t do this every day. And his poop is usually fairly normal consistency, not super soft so that shouldn’t be the main issue. But it seems like half the time he poops, he still has something there, then he comes onto my bed, sits down, and there is a small Hershey kiss of shit on my bed. Half the time I’m not home when this happens so that night I roll over and cut myself on this tiny hardened stone of shit. And I find them all the time. It is really, really gross. The breaking point this morning was I had just cleaned my sheets, put the pillow cases without poop marks onto my pillows, walked into my room, and bam a big wet one on my clean pillow. When I say “big wet one” I mean there was a mark roughly a little larger than a quarter that he had just deposited there. WHAT CAN I DO ABOUT THIS?!?!!!?!?!?!? I AM GOING CRAZY.