A philosophy professor from Pennsylvania has offered some ethical and practical advice on flirting to those of the faint of heart.

"Flirting is an art form. The accomplished flirt knows when to be subtle and when to be blunt," said Gettysburg College philosophy professor Steve Gimbel "But the game can be dangerous, especially if you are involved with someone. Does your lover have a right to be pissed at you for flirting? Like so much in ethics, the answer is it depends," he explained.