While it might not be a need just like food, water, and air, because we'd die if we don't get food, water and air but we won't die if we don't get sex. Yet sex is important to us, it’s a biological function we crave at different frequency and intensity. To be sexual with an individual, we don't need to be in love, yes love can enhance the experience but attractiveness is enough for coitus.

Sex can be used to express love in the form of making love

Couples who have pursued a purely physical relation and ended up falling head-over-heels in love with each other. Intimacy is a vital part of a healthy relation where one gets a chance to confide deepest thoughts, emotions and just open-up. The mood of minds, rapport and level of emotional contact you share with your partner determines the extent of closeness and comfort you have established so far. However, it may be just wrong to stereotype that sexual relations only strengthen your bonds with your loved ones.

Humans are sexual beings! Its a fact!