I've always loved petite girls and DFC, add to that I was 11 when I first discovered porn and hentai I was just gravitating to pictures of girls my own age (as well as nekomimi and video game girls, especially Final Fantasy at the time). And then I found my first three loli pictures (granted they are sort of young looking lolis...). A pink haired loli with just a gym shirt on bending over and smiling, Rena bending over and spreading herself with another girl sitting near her with her legs spread, and two very happy twin lolis participating in some symmetrical docking wearing frilly socks, nightgowns and colorful pantsu. For a while I went between being aroused and ashamed because of the pictures, they were cute and sexy... but they were young... "Is this right?" Eventually I realized that the only reason (that I see) that people find loli wrong is that our culture(s) say it's wrong. If you look at it at a biological or evolutionary level, once we reach puberty we're supposed to take notice of each other and taken notice of by others. And even now I'm only 18, so depending on the picture there isn't that much of an age difference. So, excepting toddlercon and actual childporn, it's natural to find it arousing. And ever since I realized that, loli has become one of my favorite types of hentai, ecchi and clean pictures. Yay for loli!
The pictures described above (they are a bit young, even for lolis... so view at your own warning. It isn't toddlercon though.)