That look on a girls face when you cum on her tits. Not a full ongrin, but just a subtle smile that you aren't sure what it means, but you think she's enjoying it.
Sherry gave me her Mona Lisa Smile when I came all over her tits, but it went away after my buddy Tim nuttedall over her face.
By Philomena
Mona Lisa Smile
After you cum you take the residual cum on the tip of your penis and apply it like lipstick to your partner's lips.
"Wow, Sam'slips look really shiny," Friend 1.
Friend 2, "Yeah, I just gave her a Mona Lisa Smile."
