Ladies: Do your male friends ever lay their heads on your chest?

Have you had the experience of male friends resting their face or head on your chest? Do you feel it’s a normal activity, in the sense of a affectionate gesture (for example if the two of you are hanging out, watching movies or engaged in some other sort of mellow activity), or do you think it’s a violation of personal space and implied platonic “boundaries”? Or possibly somewhere in between? What do you think of the term “Nature’s Pillows”? I’d like to stress that the man is not in anyway trying to “cop a feel” or derive sexual pleasure. Thoughts?