Explain what declaration Benedick makes to Don Pedro about marriage.

Benedict says that marriage turns men into impotent idiots. 

Is 't come to this? In faith, hath not the
world one man but he will wear his cap with
suspicion? Shall I never see a bachelor of threescore
again? Go to, i' faith, an thou wilt needs thrust
thy neck into a yoke, wear the print of it, and sigh
away Sundays. act 1