sensory touches at the bottom of our foot

The Organs of your body have their sensory touches at the bottom of your foot, if you massage these points you will find relief from aches and pains as you can see the heart is on the left foot.

Typically they are shown as points and arrows to show which organ it connects to.
It is indeed correct since the nerves connected to these organs terminate here.
This is covered in great details in Acupre

ssure studies or textbooks.

Every time you walk BAREFOOT you are pressing these pressure points and thus keeping these organs activated at all times.