Cheating the NASA Space Physical

You change your mind almost as much
 As you change clothes
 So let's settle down and figure out this situation
 
 And we try new things
 To see if our bodies were paying attention
 And we try new foods
 To see if our taste buds were paying attention
 They were so acute
 I don't need your diagnosis
 And I don't need your extroversion
 To know I'm not perfect
 ♪
 And I'm taking up one problem at the time
 ♪
 It's not an imbalance in hormones
 But in chemistry
 We never learned to balance those equations
 And one day this body will fail me
 Perhaps a symptom of my intolerance to catalytic changes
 It's all in my head, a psychosomatic chain of consequences
 One might call disorder
 I'm not afraid anymore of where I'll be some years from now
 Choice cereals is forever
 ♪
 I don't need your diagnosis
 And I don't need your extroversion