I remember when i was younger i used to be alot more positive and would easily laugh when someone said something negative. I wasn't even considered a nice guy. But as i got older i started listening to what other people was saying and it made me a bit softer. I can think of almost every negative thought(or negative way of thinking) that i ever had and it always leads back to someones opinion or someone saying something. The most perfect example is society trying to teach guys to feel guilty about their desires and that being ncie is the way to be. When i was much younger i didn't worry about such things, but as i got older i felt i had to be a nice guy after being taught that.