Sex Toy - an object or device that is primarily used to facilitate human sexual pleasure. Individuals who started by hooking up tended to develop a full relationship later, if that was their goal going in. Swingers in the lifestyle engage in casual sex with others for a variety of reasons. Sexually stimulating the penis by hand. In the United States, in the s, " petting parties ", where petting "making out" or foreplay was the main attraction, became a popular part of the flapper lifestyle.