[Solved] Which of the following is an example of tying? A) restrictions that prohibit patrons from bringing their own wine to restaurants B) set menus at a restaurant C) buy-one-get-one-free offers D) "value meals" at fast-food restaurants Erotic Plasticity: Erotic plasticity refers to the degree to which an individual's sex drive can be changed by societal, situational, and cultural influences. Sexually Transmitted Infection: A sexually transmitted infection (STI) is an infection that is primarily spread through sexual contact. Nocturnal Emission: An involuntary ejaculation of semen that occurs during sleep, also known as a wet dream. Erectile Disorder: A form of sexual dysfunction where there's a lack of ability to achieve or preserve an erection of the penis throughout sexual activities.