The letter 'was couched in' polite terms.
a psychiatrist's 'couch'
(..) threw this out? I'm gonna make a coffee table out of this and surprise Tina. Well, wouldn't it be invisible? I mean, what, are you gonna just sense it's in front of the couch? Well... Hello. Hello. What's with you two? - You haven't told him? (..)1991 TvShow: Seinfeld Title: The Truth Season: 3 Episode 2
(..) No, no, no. I like to strain the sauce. And I could really live without... ...the tribal music and the make-out sessions in the living room. Yeah, Tina likes the couch. - What are you doing? What is all this? - Oh, he's helping me sort my receipts. I'm being audited. You're being audited? What for? (..)1991 TvShow: Seinfeld Title: The Truth Season: 3 Episode 2