“I think a sex strike could really work on college campuses where there’s an abundance of sexual harassment or date rapes,” Lee told Stephen Colbert on The Late Show on US television. “Second semester it’s going to happen. Once people coming back from Christmas and some stuff jumps off, there’s going to be sex strikes in universities and college campuses across this country.”

A recent survey of US college campuses found that nearly a quarter of female students had experienced some form of unwanted sexual advance. More than 10% of respondents said they had been physically assaulted or threatened with physical assault by men in pursuit of sex.

The director was discussing his new film Chi-Raq with Colbert. Based on Lysistrata, a satire by Aristophanes, the film follows a group of women on the south side of Chicago who decide to fight gun crime by withholding sex from their men. In real life, the film has reportedly inspired a group of 37 women to follow suit.