Do you let your cats sleep in the room with you?

If I do let my cat sleep in the bedroom he wants to find the warmest spot, which is on my face or under the bedclothes next to my body. I think it is better to provide a cat with a warm sleeping place of its own. Cats often sleep during the day and want to be active in the night. On the other hand, a cat can be good alternative to a hot water bottle:>