PDA: Public Or Private?

So millions of us tuned in last week to see Prince William and Kate Middleton tie the knot in London last Friday. While Kate, the dress and ceremony were beautiful and William looked handsome as ever, I couldn't help but notice the lack of PDA between the two.
Just before the much anticipated kiss between the two on the balcony of Buckingham Palace, it was mentioned by a commentator that William doesn't really like public displays of affection. This seemed apparent in the kiss, which you probably missed if you blinked. The crowd was dissatisfied with the first kiss and apparently chanted for them to kiss again. The second one was a little bit longer than the first.
While some were disappointed that their kisses weren't more passionate, romantic or lengthy, I couldn't help but put myself in their shoes. Would it not feel a bit awkward and embarrassing to kiss in front of your grandmother, who happens to be the queen, and billions of people?
And let me ask you this, wouldn't you feel uncomfortable if William or Kate slipped the other the tongue? These two have never really shown any sort of PDA out in public. While there's no doubt they were feeling the wedded bliss (or anxiety/adrenaline), they were also definitely feeling the eyes and opinions of billions of people watching.
While this sort of public situation is not one most of us will find ourselves in, the debate of PDA certainly still applies to us commoners. I've never seen anything wrong with a little hand holding or a quick peck (a la the Duke and Duchess of Cambridge). However, a full-on make-out session may be a bit much out in broad daylight (a dirty frat house basement is a bit different ;).

It's like people are putting on a show. Onlookers are uncomfortable, yet can't look away. To me, this sort of PDA just seems more like a form of insecurity rather than simply being wrapped up in the person you're with. You need to show everyone how you feel about each other. You feel the need to show everyone the passion the two of you share. While I have to admit there are exceptions to this (i.e. soldiers leaving or coming home from war/ long distance relationship greetings and goodbyes), passerby's aren't thinking "wow, they must really be in love;" they're more likely thinking "get a room."
Being alone where you don't have to worry about the people around you, in silence where you can truly let your hair down and emotions show seems like a much more romantic setting to share your affection for each other. I think that Prince William and Kate are the epitome of having confidence in your relationship.
They know how they feel about each other. They know they love and care for each other. And while their circumstances are a bit different when out in public, the two don't broadcast their passion and affection for each other for all to see.
Don't get me wrong, I love hand holding and the occasional PG-rated kiss when out and about when the moment feels right. But that sort of PDA is far different that groping, rubbing, making out and being all over each other. To be frank, it just doesn't seem classy.
xoxo Nickie