It’s in his kiss.

http://www.youtube.com/watch?v=VwGGZTZ-3pM


Google results for;
“I should of kissed her”
About 86,400,000 results
(0.07 seconds)

Google results for;
“I shouldn’t of kissed her”
About 72,900,000 results
(0.39 seconds)

Google results for;
I should of kissed him
About 53,600,000 results
(0.25 seconds)

Google results for;
I shouldn’t of kissed him
About 46,900,000 results
(0.34 seconds)

Do the maths. More people regret not kissing their partners than kissing them. Kiss her. Kiss him. Don’t live with regrets.