This was an interesting article about how the use of contraception can have deep implications most people are not aware of.  I would like to add to Fr. Longnecker's thesis that men, even though they do not use contraception like women do, are affected by its use as well.

Primarily they can lose their focus on what it means to be a father ie. sacrificing hinself for his wife and children, and begin to make pleasure their number one goal.  I have seen this countless times from my own experience.