ScarJo, Penn Skip Off to Cabo They say they're not dating, but ran off to Mexico together By Evann Gastaldo, Newser Staff Posted Mar 3, 2011 8:43 AM CST 10 comments Comments Sean Penn and Scarlett Johansson (Associated Press) (Newser) – Despite insisting last month that they're just friends, Scarlett Johansson and Sean Penn continue to set tongues wagging that there may be just a little bit more going on. Tuesday morning, they took a private jet to Cabo San Lucas, Mexico, where they were seen having lobster and margaritas, People reports. They were back in California by early yesterday. Penn, 50, and Johansson, 26, were also spotted earlier this week having a very friendly-looking lunch—ScarJo had her leg in Penn's lap. Click to see another Hollywood A-lister recently linked to Johansson.