I used to raise dogs, so I've been using my old dog training tricks to get Charlie to give out hugs and kisses on demand. I've trained him using the phrase, "Best Friend Hug!" I will say, "Give Val a Best Friend Hug!" and he will run over to her and give her the specific type of hug I've specified.
It's a great party trick with a dog, but it's even better with a human. Dog training has proven itself to be surprisingly handy as a parent! I only use it on little things like this though.
Does your LO gives hugs and kisses on demand?