In one of the Star Trek Next Gen episodes, Picard is required to take a vacation. Picard is going to a planet that is one giant vacation resort and Riker asks him to pick up a souvenier called a Horgon. In one of the scenes you see that Picard is sitting on a lounge chair reading a book with the Horgon sitting next to him. Someone comes up and starts chatting and you learn that having the Horgon next to you means you are interested in some, um, stimulating experiences while on the trip.