I have several reasons why when i think about it...
1) I saw other photos here and i wanted to be a part of the fun
2) I grew up being the center of attention being the only daughter of 5 children and the youngest. Having a dad who was into freelance photography always taking pictures of me in front of the neighbors rose bushes holding a flower was the story of my childhood. So i suppose i was always comfortable in front of a camera.
3) Even though this sounds strange coming after the above explanation, i was also very insecure. I was a late bloomer, lanky, flat chested and awkward. I never had the attention of the boys in school compared to the other more "cheerleader" looking types. So to be who i am now and not be afraid to wear lingerie and feel so awkward is very flattering.
4) About videos: I've always been a porn junkie, watching it that is. I was exposed to it at a young age and i almost idolized the women who were so comfortable with their sexuality on screen. I envied that because i was so much of a modest person, raised in a super religious outwardly prudish family.
After watching a lot of porn and coming across Xtube (and this site where so many were posting their jack off videos) i saw amateur porn for the first time on the internet and was so much more turned on. But out of all the videos i had ever seen, they lacked a personal chemistry or a good reflection of what me and my husband were like in the bedroom. So i bought a webcam and got the guts to do a video just for us to watch. We were so pleased with it that we decided to post it on xtube, given it was the holy grail theme of porn we were never able to find. We figured there had to be a niche out there who would enjoy it because it wasnt the "typical" blonde hair, big boobs, tan, bald guy with tattoos fucking the shit out of some chick and then cumming on her face predictability factor.
If i ponder any other reasons why, i'll let you know. Everyone wants to feel good about yourself, no different here. Sadly, it didnt go over as well with the female folk.
I did think of one more reason for the videos. Someone has to offset the jack off videos right?