sleeping on my bed a lot now?

hello i have this cat that almost never slept on my bed but now hes always sleeping on it and especially if another cat is o n the bed then he HAS to be on it!

Could it just be because winter is comming even tho he has a huge long haired fluffy coat? Just something i never understood

How old is he and how long have you had him? Colder weather is definitely a factor with Maia sleeping in bed with me! Summer she tends to hang out by the AC. Cooler weather she sleeps either under the covers with me or curled up inside my bent legs snuggled into the blanket! Always on alert when I attempt to roll over in my sleep that I don't toss her into the wall!