Leaving your phone lying around unattended? Bad idea. Amy Schumer recounted the story last night to Jimmy Fallon on 'The Tonight Show' about sending a pretty funny (and really inappropriate) text from Katie Couric's phone to John Molner, Couric's new husband.

If you're easily offended, stop right here. You've seen all you need to see.

The 'Trainwreck' star explained to Fallon that she was sitting at the same table with Couric at the Glamour Women of the Year awards ceremony, when Couric walked away from the table for a couple of minutes, but left her phone behind.

Opportunity knocked, Schumer answered. (Here comes the NSFW part. You've been warned.)

"She left her phone open to texts from him. Don't worry! I didn't do anything," Schumer said. "Except I picked it up, just without even thinking, to text him: 'I wanna have anal tonight.' And I sent it."

Looks like Couric took it pretty well. The joke, that is. She responded on Twitter this morning.

Note to self: Keep phone away from @amyschumer at all times. #epicprank #itspaybacktimesister

Check out the video from 'The Tonight Show' when you don't have little ears, or uptight coworkers lurking.