A sex toy is an object or device that is primarily used to facilitate human sexual pleasure. The most popular sex toys are designed to resemble human genitals and may be vibrating or non-vibrating. The term can also include BDSM apparatus and sex furniture such as slings, but it is not applied to pornography or birth control items, such as condoms.

Alternative terms include adult toy and marital aid, although marital aid has a broader sense and is more appropriately applied to drugs and herbs marketed to supposedly enhance or prolong sex.

NABBW Associate and Boomer Women Sexuality Expert, Dr. Dorree Lynn writes about the use of sex toys in her NABBW columns and in her book, Sex for Grownups: Dr. Dorree Reveals the Truths, Lies, and Must-Tries for Great Sex After 50