Dean McDermott -- Good Morning, Ladies ... Have You Heard? My Sex Life Sucks

Information Dean McDermott could have used before this photo was taken: Guys who are trying to save their marriages, after admitting cheating and telling the world their wives suck in bed ... should NOT be seen chatting up women in public.

Hours after Dean and Tori Spelling aired their dirty bedroom laundry on their reality show ... Dean hit up an L.A. coffee shop -- solo -- and shared a few laughs with a couple of ladies.

Sure, it could be totally innocent, but Dean's gonna have a hard time getting the benefit of the doubt after his couples therapy confession that he cheated ... BECAUSE sex with Tori "wasn't fantastic."

Home brewed coffee can be good too.