"..the kisses of an enemy are deceitful." (Proverbs 27.6) according to the Bible, kissing can be a dangerous pastime.
Judas' kiss led to Jesus' arrest, trial and execution [Mark 14:45-46].
Even more disturbing was the murder of Amasa [2 Samuel 20:9-10].
Joab threw Amasa off guard by grabbing the man's beard in his right hand and pulling him in for a good face sucking!
Understandably taken aback, Amasa didn't notice the sword coming his way, wielded in Joab's left hand - to deadly effect.
For those undetterred by these dubious historical precedents, kissing is positively encouraged in the Christian community.
On no fewer than five occasions [Romans 16:16; 1 Corinthians 16:20; 2 Corinthians 13:12; 1 Thessalonians 5:26; 1 Peter 5:14] are we commanded by apostolic authority to greet fellow believers with a kiss.
Which is great news if you want to get it on with that attractive young thing in the side pew (after the service, of course).
Remember: James 1:22 says be ye doers of the word, not hearers only (or something like that).