According to Osho, he mocks marriage to reveal how a once-living bond has decayed into a social trap: vast expectations, borrowed promises, and postponed happiness that rarely arrive. The institution, repeated without awareness, breeds misery and hypocrisy. His laughter is a wake-up call to reclaim courage—either to reinvent relationship from consciousness and love, or to drop dead patterns and find happiness here-now.
He jokes about marriage because people follow it blindly expecting happiness, but end up unhappy; better to be brave, aware, and create love freshly—or not at all.