Perhaps men with premature ejaculation have formed very powerful (sensitized) pathways that lead to high state of arousal and a quick ejaculation. These parents are beginning to realize that abstinence-based sex education is more beneficial than the model now used at their daughters' high school. See Why Do I Find Porn More Exciting Than A Partner? The more sensitized your brain is to something, the more automatic the particular behavior becomes, and the more triggers will arouse a strong sense of anticipation of pleasure (regardless of the reality).