I love a picture that tells a story. Here we have a couple on vacation, maybe sitting on the balcony of their beach-side hotel room at a nice resort. They're hanging out. She's in her bikini, eating a salad. It's sunny, but no one is on the beach. Maybe it's the off season, or just early in the day.
With a little privacy to themselves, she's feeling frisky. She pulls down her bikini top to flash him her breasts. This excites him, and he starts to get hard. She pulls him out of his pants and begins to stroke.
A wonderful, relaxing way to start a vacation day.