All weekend long I've been having fantasies about a coworker, making out and sex and such. When I have fantasies, I almost never think about my boyfriend. The fantasies I do have about him involve the two of them at the same time. I've known my coworker for almost six months and have been fantasizing about him for those six months, but I haven't known my boyfriend for very long.

Is it normal to fantasize about people other than your boyfriend? Is it normal not to fantasize about your boyfriend at all?

Thanks.