Some good stories here.
My wake-up call was the transition between a girl (Lets call her "CRS") I was sorta seeing, into a new girlfriend (and current girlfriend) (Let’s call her "KM") who I love dearly.
This girl CRS I saw for about 4 weeks. I was never really into it, but she really liked me. Eventually I had to break the news that I want to stop hooking up because I wasn’t really feeling it. So I did that, and although disappointed, she handled it well.
2 weeks later I had sex with her when I was drunk and it wasn’t much fun. I couldn’t’ get a full hard on and we eventually stopped mid-way. She virtually made no reactions and I was sorta questioning my abilities over it.
What woke me up though, was about another week or 2 after THAT, we were chatting over the internet and she started teasing my for having a small dick. This girl was head over heels for me, but I didn’t like her and I was seeing a new girl (KM), so it was more of a self-defense action for her to bring me down, rather than actually meaning that I have a small penis. But if I had a big dick, she wouldn’t be saying it. So it stuck in my mind.
Another thing that woke me up was I had sex with a virgin (KM - current girlfriend) and it didn’t hurt her. I know that sounds wrong, but it made me question myself regardless. I was going slow and asked her if she was alright and she said "yeah" in the tone of "of course! Why wouldn’t I be?". Which stuck in mind.
Another thing, and the main thing, that woke me up was a few months later I was having sex with KM, and the condom gradually slipped off (regular sized condom) mid-way through sex, without either of us realizing, and I blew inside of her. We had to go and get the morning after pill the next morning.
These 3 things mixed with underlying fact that I want to get a better reaction out of my girl KM when we’re having sex, made start searching the internet about penis sizes.
I searched "Ideal penis size" in google, and found this page: The Ideal Penis Size - The Penis Size Preference Chart: preferred penis size, penis shape and penis looks. , which, while at the time in denial about size mattering, essentially told me that my current size wouldn’t be satisfying for women. I was shattered. That site has a link to TP on it. I browsed the site with full enthusiasm and eventually started up a routine, and got some decent gains, but had to stop due to lack of privacy.
I was delighted to increase my size, and I got enough size to be comfortable with. But I want more, of course.