Pavlov and hobbies

Hobbies are after eating and drinking , What are you doing ？
Some people like sports , Better for muscles ;
Some people like music , Good for mood ;
Some people like movies , Maybe I prefer immersive drama experience ;
Some people like fishing ： May prefer to relax , And the intense feeling of catching fish ;

So think differently , People with different levels of experience have different hobbies ：
Children may be interested in toys ; Be curious ;
Middle school students are interested in games ; Show off ;
College students are interested in objects ; Chasing stars , Show off ;
Graduates are interested in work ; Skill , match ;
The boss is interested in making money ; golf , The yacht , International competition ;
Old people are interested in health and wisdom ; Growing flowers , square dance , tourism ;

Man as a creature , Intelligence is relative to animals , Maybe the difference is not that big , Because man evolved from animals ;
People's more intelligence comes from the memory of the reflection arc that can be brought by training in the background ;
Basically, for the reflection arc , It must be chemical .
So the interest may be more related to Chemistry ;
for instance ： sex , motion , diet , Music environment association reflection arc , The tension of the game , Cold and warm , Tired and relaxed ;