I'm dog is super rough but sometimes she likes laying &' falling asleep on my belly I'm almost 20 on Monday.
My own cat who weighs omg like 17 pounds he's not fat just super big Maine coon, he always lays on my belly it's so comforting but uncomfortable. My other cat couldn't care less and my 1 dog is always by my feet the other one is normally eating socks
I have 2 cats And a dog and they are all like that lol.
I think animals do sense something. My cat is the same way and on thanksgiving my sisters dog would not leave my lap.