Smash the cake is one of the funniest experiences you can have as a photographer.
You'll need a pretty cake (professional look better), some subtle decoration and a gorgeous one year old eager to explore. Photographer with sense of humor is a must.
To be honest I didn't sleep well for a few days prior to my first Smash The Cake session. When you expect a carnage you are not quite sure how the situation is going to collaborate with your professional  perfectionism to photograph same pose over and over till you get the perfect shot. In cake cases you'll need to be pretty quick.
From personal experience I've learned:

• Prepare a bath for the end
• Dress baby in diaper cover or plain dress. You want the attention on the baby face expressions, hands and feet right
• Avoid chocolate cakes. Can provoke wrong associations when messed up
• Take some detail shots before putting the baby in
• Don't overdo with backgrounds or decorations
• Tell mum to give the baby cake at least once a few days prior to session. This is an important part and will give mum a hint if her baby has any allergies or reactions. Some babies don't like the texture of icing or cream believe it or not and may get very upset as it sticks to little hands. Others are seriously impressed and explore the cake thoroughly.
• Have a spoon handy in case the baby needs some help to smash the cake and gets it messy
• Keep some water for the baby at hand
• Let the baby be fed at least 30 minutes before the session. He wouldn't be hungry or grumpy when you meet him with the cake
• Have absolutely everything ready before you put the baby in
• Move around to get different angles
• It's usually very short. Unless you have 2 cakes
• Have fun

Shooting a wedding is stressful enough on its own. When I was asked to photograph a gay wedding for a first time I was initially very glad and truly excited. I've worked with gay people in the past (not as a photographer though) and had only good memories of funny, caring and gentle boys. 
However I've also heard stories of such events going terribly wrong and after the initial excitement I got cold feet. Was I prepared enough, did I had experience working in such intimate private matter with gay people? Well honestly no. 
I can now admit that I was nervous and had doubts but I shouldn't have.
Apologies Gabo & Carlitos. You are both great people and I wish I had no worries before your big day. It may have been hormonal due to my late pregnancy though. Anyway it only lasted till I got to the small garden behind the Mayfair Registry Office and met you two. Both dressed perfectly balanced with every little detail well considered. 
I can now gladly confirm these boys were prepared and capable of organizing a fantastic day, sure better than many fashionista brides. The entire event was very well planed and all guests delighted with the little surprises throughout the day. From the get together the day before, the champagne outdoor reception in glass flutes, the old red double Decker to drive guests through city, white and purple bags of sweets, personalized water bottle labels all the way from Mexico and the chance to take a selfie in the photo corners all the way to the fabulous cake.  All brilliant ideas and execution. 
Have a fantastic life together Gabo and Carlitos and thank you.

This very private couple didn't want to go public, so be it....I respect all my clients feelings.