A large gap between the teeth is an abnormality which some people are affected by. It is permissible to close a gap between the teeth and there is no sin in doing that

Working as a massage therapist during the day in Ramadan does not break the fast for the therapist or for the one who receives the massage.

Jathum (sleep paralysis) refers to kabus, which is not a myth or fable, rather it is something real that does happen; it may be caused by physical factors or it may be caused by the jinn.