Do you let cats sleep in your bed?

I wish my cat would sleep in my bed more often! She makes me feel safe. She usually likes to sleep in the living room on one of our chairs which has kind of become her "throne," and sometimes will sleep in my doorway/right outside of my bedroom door if it's closed. However, some nights she will creep into my room and hop up onto my bed -- I don't know why she does it when she does it, but she's always welcome! Generally she'll sleep at the foot of the bed, but sometimes when it's colder outside she gets closer. I sleep on my side, and one night I woke up to find that she was sleeping pressed up against my back, curled up in a little ball! It was too cute. I don't really worry about hygiene, because my cat is an indoor cat and is basically cleaning herself 24/7... She's probably cleaner than me!