It started with Britney and Madonna, but the trend has only accelerated in recent months.
We're talking girl-on-girl action, of course, and we're talking lip locks between such A-listers as Tina Fey and Amy Schumer; Miley Cyrus and Katy Perry; and plenty of other well-known females.
Which of these same-sex smooches has been the most sizzling?
Try to keep your keyboards and your computer screens clean, fellas, and check them out below:
Britney Spears and Madonna
Sandra Bullock and Scarlett Johansson
Sandra Bullock has good taste in women. She smooched Scarlett Johansson at the 2010 MTV Movie Awards.
Meryl Streep and Sandra Bullock
You didn't expect to see these two on this list, did you? Sandra Bullock planted one on Meryl Streep at the 2010 Critics Choice Awards.
Britney Spears and Rihanna
Britney Spears and Rihanna nearly broke the Internet with this kiss. It took place at the 2011 Billboard Music Awards.
Madonna and Christina Aguilera
Madonna famously kissed Britney Spears on stage. But she didn't forget Christina Aguilera as well as the 2013 MTV VMAs.