Place the XO mold on a flat surface. Melt about one-third of a bag of white chocolate. Divide it into two bowls and tint one pink and one red. Pour the red chocolate into the heart cavities and the pink chocolate into the X cavities. Place in the fridge until set.
Melt one full bag of white chocolate and stir in Valentine’s sprinkles. Start with 1 tablespoon and add more until you reach the sprinkle level you like.
Fill the s’mores mold halfway with the sprinkle chocolate.
Spread a small amount of strawberry preserves on one chocolate graham cracker. Place it into the mold with the preserves side facing up and gently press it down. Pipe a dollop of marshmallow fluff in the center, then top with a second graham cracker.
You can also switch the order by placing a plain graham cracker first, followed by the fluff, then the preserves cracker. Both options work great.
Cover with more chocolate and gently tap the mold to remove any air bubbles. Refrigerate for at least 30 minutes, or until fully set.
Remove the s’mores and the XO candies from their molds. Melt a small amount of white chocolate and use it to “glue” one X and one heart onto the top of each s’more. Arrange them however you like.