Ricky Martin Hangs Out on a Yacht with Husband Jwan Yosef

Ricky Martin and Jwan Yosef are more than just two peas in a pod -- they're a couple of heartthrobs on a barca.

The Latin pop singer was hanging with his hubby Saturday on a yacht in Sardinia, Italy -- where they were both rockin' some sweet trunks and going shirtless on what looks like a super relaxing vacay. No sign of their twin boys here ... so it might be dads' day out.

The question now ... who's studlier?? Ricky's got the casual bro look going for him, but Jwan's kinda got the classic summer beach boy thing working too. We gotta ask ...