"everything we do or think is a result of our instincts. The reason it may not seem this way with humans is because we are intelligent enough to think ahead of the present and examine things critically."
That whole sentence contradicts itself. If we are capable of critical thought, and therefore able to react differently to our basic instincts, then everything we DO is not the result of our instincts.
You pretty much shot yourself in the foot with your first sentence.
You also left out some very important points. Perception is one. Which varies greatly from person to person and has little to do with pre-programmed instincts.
A persons upbringing/environment and the perceptions they form are going to have a much larger effect on how they perceive acne as opposed to their 'primal instincts'.
heeh I'm in the same boat... attracting a girl and then worrying abouy your back acne sucks.. its a load on your chest indeed.. even though it really should not be.
There are attractive people can deal with it...
Having said that, there are also girls who wont date you because of it.
Although you aint missing out on much if your back is the deal breaker.
Obviously there are other things about you that are attracting these girls, so its not like you have one major feature - back acne... Sus them out and go with someone who you think will be accepting... You can usually tell who is going to drop you for dead at the sight of a pimple.