HI
Ollie my 18 week old maine coon does that every night. He especially likes it when I have just come out fo the shower and have wet hair whcih he then proceeds to give another thorough cleaning for me!!! lol
Not so bad at the moment as he is only 6lb but not sure what will happen as he grows, it is so cuddly when he does it though and he purrs away so happy I haven't got the heart to stop him. It's only at night once we've all been fed etc and settled down for that last hour before bed.
Allison XX