This makes me laugh so much. Debbie Isitt, the director of the film Nativity! gets embarrassed and giggles when Martin kisses actress Ashley Jensen making them laugh as well.
This film is mostly the actors improvising so I suppose Debbie didn’t expected them to kiss…even though they play a couple (Martin: “You wanted love…” ) lol it’s funny.
(Source: http://watsonsdick.tumblr.com/)