Don Juan: A man who is an obsessive seducer of women. son of a gun: euphemism for "son of a bitch" (a profane term for a man who is nasty, rude or otherwise offensive).
in the doghouse (slang): in great disfavor or trouble. jackass: 1. a male donkey; 2. a stupid or foolish person. serve one right: to treat one as one deserves, esp. to punish justly.
Postcard Funnies showcases and celebrates vintage comic souvenir postcards. The humor on these postcards was sometimes politically incorrect by today's standards.