Bodily functions that follow "a law unto itself" are controlled by the involuntary nervous system. this system is also termed and functions to

Involuntary nervous system also known as autonomous nervous system.It is a division of pheripheral nervous system that supplies smooth muscle and glands,and influence the function of internal organs. It functions largely unconsiously and regulates bodily functions such as heart rate ,digestion,respiratory rate,pupillary response,urination.,and sexual arousal.

This is s cute awee : (( . well if she's showing you signs that she may like you , then shoot your shot ! don't be afraid . & if you're unsure that she's giving you these signs , then wait out for a little bit . most girls are different . some may act really sweet , but only bc you're a good friend of hers . that , or she might like you . you just never know . but i think you should sit down with her & tell her how you feel . but don't be awkward & shy . just be straight up & tell her how you feel . if the feelings aren't mutual , then don't cry about it . you need to respect her decision & look for others in the world . feelings can be difficult & confusing , but don't be afraid to show them . i say you play it out & if you're still unsure about it , talk to her . - rach