The shirtless guy in the white running shoes and tumble-down socks on the left exudes a certain confidence that you can have no doubt served him well with all those bathing suit clad ladies.
You've got me noticing the details now. What strikes me as odd is that none of these kids are looking at each other or the camera. Except for the couple in the foreground. Clearly, the guy wasn't going to pass up the opportunity to make time with the young lady, who is clearly the stone fox of the group.