A colleague of mine (a mother) recently admitted that her husband and child would be "very naughty," if it weren't for her. Meaning, she always roots them in a routine/rhythm for life (when to eat, when to quiet down during the evening and go to sleep etc.)
When I was a child, it was always my mother who set my biological clock (I distinctly remember her always waking me up before school in the morning, even until I was in high school.) Even until today, my life partner always makes sure I wake up for work in the morning (I rely on her, and not an alarm clock). Also, if she's hungry, then all bets are off until I
get
her
fed. ... So, you can imagine, my eating schedule is also heavily influenced by that distinct force of nature.
Myself, I'll tolerate hunger, staying up past my "bedtime" or even sleep/nap much more liberally than she ever will.
Although I can certainly establish myself in a routine as I was able to do when I was single, I find I'm much less strict about this than the women in my life.
So, do the women in your life act as your biological clock?