There's a lot there, and a lot of the kisses fail communicator's 'really getting into it' test. On the other hand...
See! Doctor perfect snog the junkie hobbit (hobbit not into it for a change)
See! That Snog from Y tu Mama Tambien (in the full post there's a sequence of shots so you get the full impact)
Some film called Burnt Money (Cripes)
See! Listy and Rimmsy (Rimmer not getting into it, alas)
See! That guy out of Special Victims Unit, back when he was in prison in Oz
See! Clive Owen sticking his tongue in some guy's face
Alan Rickman
Alan Tudyck (can't see anything alas)
Nathan Fillion
Trey Parker and Matt Stone
Keanu
Kiefer
Phew...
(ETA from comments)
Russell Crowe
An all time favourite - Roche and Carlyle in Priest (stills don't do it justice)