You loved Swiss and would get jealous very easily. Swiss knew that, and he loved seeing you jealous more than anything. He would be affectionate to the other ghouls just to see you jealous

Today he was being affectionate to Sodo all day. Grabbing him, touching him, kissing him on the cheek in front of you. After he did any of those things, he would turn to you while still holding Sodo "Why? Are you jealous, darling~?"