Which of the following ingredients is NOT found in a Sex on the Beach cocktail?

In a Sex on the Beach cocktail, the primary ingredients typically include vodka, peach schnapps, cranberry juice, and orange juice. Pineapple juice is not a traditional component of this drink, but it is often confused with tropical cocktails that might incorporate it. Amaretto, on the other hand, is not used in the Sex on the Beach recipe. It is an almond-flavored liqueur and does not complement the fruity, vibrant flavor profile that defines a Sex on the Beach cocktail. The inclusion of vodka, cranberry juice, and peach schnapps contributes to the cocktail's sweet and fruity taste, while amaretto does not align with these flavors. Thus, it's this distinct combination that identifies the Sex on the Beach, making amaretto the ingredient that is not found in this particular cocktail.