Twitter's Jack Dorsey enjoyed walk on the beach in Hawaii with a shirtless Sean Penn Tuesday, enjoying a break with friends after a testy few months for the tech CEO. Dorsey, 43, appeared relaxed as he spent the day with the actor, 60, and Israeli venture capitalist Vivi Nevo, 59. In pictures obtained exclusively by DailyMail.com all three men can be seen strolling along the sands in their shorts. Dorsey opted to keep his shirt on while Penn and Nevo went shirtless. Onlookers say all three men arrived after lunchtime on Tuesday before all leaving together a few hours later.