Down: 1. skin infestation by human itch mite
4. person's emotional, social and
psycological well-being
6. highly contagious virus
8. considered as world's pandemic
9. complete emotional and physical well-
being​

Both sexes because it is always romantic

Behavioral science is the study of human behaviors and how they can be influenced.  by examining patterns in behavior as well as reactions, individuals with behavioral problems can be more adequately treated, resulting in greater mental health of our society/the public.

Hyper extension is the extension of a limb/body part beyond its limits