In 1972 and 1973, the two Pioneer spacecraft were sent out to explore the outer solar system. Being the first human-built objects to be able to achieve escape velocity from our solar system, it was decided to include a message should any aliens intercept them.
Carl Sagan was approached to design a plaque with a message from humanity, and Linda Sagan created the artwork, and the plaques were fixed to both spaceships.
We sent *unsolicited* nudes and a map to our house. Nothing at all creepy, stalkery, or desperate about that.