Flirting

The Ninth Doctor claimed that, for Jack Harkness, merely saying hello was flirting. (TV: Bad Wolf)

Clara Oswald enjoyed flirting with the Doctor. (TV: The Bells of Saint John - Hell Bent) Her Oswin Oswald echo flirted with Rory Williams to help take both their minds off the horrors of the Dalek Asylum. (TV: Asylum of the Daleks)

claimed that traps were her flirting. (TV: The Magician's Apprentice) When pretending to be the Doctor on the Mondasian colony ship, she joked that her interactions with Jorj were "roughly human flirting". (TV: World Enough and Time) When she later met on Floor 1056 of the vessel, the two heavily flirted with one another. (TV: The Doctor Falls)

Upon meeting Martha Jones, William Shakespeare was instantly captivated by her beauty and openly flirted with her whenever he could. When the Tenth Doctor promised that they could flirt later, Shakespeare coyly asked if that was a promise, expressing an eagerness to extend his flirtations to the Time Lord. (TV: The Shakespeare Code)

When an accident with the thermocouplings caused the Doctor's TARDIS to materialise inside itself, (TV: Space) the outer shell drifted slightly into the future allowing a future version of Amy Pond to come and inform the past version of herself what to do. Much to the Eleventh Doctor's dismay, the two Amys first flirted with one another. (TV: Time)