They say you're not supposed to dip your pen in the company ink ... and Jacksonville Jaguars star Marcedes Lewis says the same rule applies to NFL players -- don't date cheerleaders!!!
Lewis was out at Boa Steakhouse in L.A. a few days ago when we asked if there are any special rules about cavorting with the ladies from the cheer squad.
That's when Lewis broke it down for us -- "That's not cool ... it's all bad news."
"You just don't do that," Lewis explained ... "especially not your own cheerleaders."
In related news, here's a video of the Jags cheerleaders on a lingerie photo shoot ...