When you are trying to sleep that is!
I always start off cuddling dh who is on my right,then turn over with him following me,then roll on my back,finishing with me on my right .By this point dh has had enough of all the messing about and has retreated to his side,leaving me with loads of space which was my plan all along 
This routine never changes.Please tell me I'm not the only one who has a unbreakable routine.Disclaimer: this is a v light hearted thread