Do your dogs sleep in your bed with you?

I know it's not very hygienic but our dog does love to sleep in our bed. My one rule is that is sleeps on top of the covers. Dino will put his head on the end of the bed for an invitation to come up, and as soon as I see that face I can't resist!! Dino is quite devious sometimes he will wait until we are already asleep and then jump up, unfortunately we only have a double bed, with me and my partner it doesn't leave much room for our collie. I do often wake up and Dino has managed to lay in the middle of us with his head on my neck, he is so cheeky.