When it comes to celebrity couples making out in public, you'd think all those beautiful people would know how to make a kiss look hot. They manage to do it on-screen with complete strangers, and frankly, a large part of their job is to hook up take after take and make it still look steamy and unrehearsed, right? But as our slideshow-happy friends at Us have shown us, stars are seriously lacking in the hot and heavy PDA department. While some couples (Drew Barrymore and Justin Long) are downright sweet, and some are disturbingly turning us on at such an early hour (Enrique and Anna Kournikova, natch), we'd like to officially ban any future photos of a select few couples getting down and dirty ever again. The good, the bad, and the nauseating, after the jump: