Why do little siblings like to "snuggle" with older siblings?

I woke up this morning and had not one, not two, but three little kids in my bed hugging me. Like its sweet and all but to wake up and have the first thing you see be twin 6 year old boys and a 4 year old girl in your bed is not the ideal way to wake up for me. I tell my little brothers and sister to go "snuggle" with one of our other brothers or sisters. But they say "But Jermy (cause they can't say jeremy yet hah) your snuggly." I do not know how I am "snuggly" but i find it strange. I never used to move into my older sisters or brothers beds in the mornings. And now when I go to bed I always find a stuffed animal or "blanky" in my bed cause they leave all of their junk in my bed! I told them they couldn't come into my bed in the mornings and they started to cry so I gave in but why the hell do they like to come into my bed??? Its not like they sleep on the floor, they have their own beds and rooms