system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are warm blankets cozy, but rooms of the same temperature are stifling?

EDIT: I mean blankets that have been exposed to an artificial heat source (such as a dryer), guys! Not a regular blanket I've been sitting under.

I'm not that big of an idiot.
gpt
Warm blankets are cozy because your body generates warmth which is transferred into the blanket and air trapped under the blanket. This warmth slowly dissipates out the outer side of the blanket into the cooler room and you don't over heat, allowing your body to relax as it is not working to raise or lower your internal temperature. 

In a room of the same temperature your body is still creating warmth but it has no where to dissipate to. This makes your internal temperature rise and you feel sweaty and uncomfortable as your body tries to cool down.