I'm 19 and my boyfriend is 28. We've been having sex for a year now and we have not been very careful at all. We never use condoms! It's weird though cause I have not gotten pregnant. He usually doesn't ejaculate in me LOL but still. . . . I always joke and tell him he's sterile but now I'm really thinking he is. Since I haven't gotten pregnant does this mean there is something wrong with my boyfriend or me? Or does it just mean I'm lucky?