Here's why....
he's a fucking liar. PERIOD.
Well, technically he didn't fuck Monica. They never had intercourse.
Technically he had sex with Monica Lewinsky.
Are you jealous?
Nope, it seems you are in denial though.
He had sex with a subordinate which is wrong, and he lied under oath, another wrong.
That's funny. Thanks for playing...
You have no business saying "That's funny. Thanks for playing..." at the end of that interaction.
It's like you know the saying for handing someone's ass; but you forget that you have to hand someone their ass for the saying to hold any weight.