Is it normal to have sexual fantasies about these people?

Yes. Also, try rubbing one out to their Facebook profile pictures. This is a normal activity, and if you tell them you do it they will feel flattered.

Source: personal experience.

yep .. feelings cant be controlled

Yes . Now can I ask you something? What compelled you to post this nothing question? I mean seriously are you completely lacking a brain of your own and/or common sense? Come on now. Don't make life harder than it needs to be. Are you a witch? Planning some freaky voodoo on your co workers? Planning on murdering them then boning their corpse? I doubt it. I wish your question was half that exciting or thought provoking.

Yes its normal well to me .the first time I read 50shades of grey I fantasized about my crush doing that stuff to me

I don't feel