The combination of vodka and Kahlua was called a Chocolate Martini. Kahlua is coffee flavored, not chocolate. That drink is commonly called a Black Russian.
It was reported that Liz Taylor had intentionally arranged for Richard Burton to meet her on set of their Cleopatra film during the scene where she was emerging out of her milk bath. Drunk or not, surely he never knew what hit him.
The 1940s audiences watch a trailer is for National Velvet (1944). The trailer ends with a "G-rating" classification. These ratings were not in use until the 1960s - the filmmakers obviously used the '70s re-release version.