Flirting

"Would you take offense if I had the gall to plant a kiss on this beautiful shoulder?" "You'll figure that out soon enough after the deed." (poster by Henri Gerbault)

Flirting, formally known as coquetry, is a form of social communication via body language, verbal expressions, or written language, intended to evoke feelings of playful excitement and potential romantic or sexual interest. Flirting can change in intention as well as intensity, whether it is performed for short-term fun or employed with a longer-term intention of seeking a romantic or sexual relationship.

A person might flirt with another by speaking or behaving in such a way that suggests their desire to increase intimacy in their current relationship with that person. The approach may include communicating a sense of playfulness, irony, or by using double entendres. Friendliness is distinct from flirting.

A study in body language: Haynes King's Jealousy and Flirtation
Laurel (played by Marilyn Monroe) flirting with Dr. Fulton (played by Cary Grant) in the film Monkey Business (1952)