Snuggling/holding babies and toddlers is my favorite thing ever. If my kids never aged past 18 months I'd be happy forever. As my kids get older it's harder and I need that space.
The closest thing to this is just having cats. I literally can't lie down without my cat excitedly running over and hopping onto my chest to take a nap. My other cat is more of the toddler stage; he runs around and wants to play all the time and always wants to know what I'm doing. They're both adorable and affectionate, and they know how to poop in a box and won't ever need my fiancee or me to pay for them to go to college.
You have kids that want to snuggle? I wonder what that’s like.