Answer: The age of legal consent in most states is 16. However, beware that if he is 18 there is not a age of legal consent and he could be charged with rape or contributing to the delinquency of a minor if it can be proven the two of you have had intercourse.
Answer: no one can accurately diagnose you from a description, it could simply be a case of eczema if the splotches are itchy or even an allergy. You need to see your doctor for a proper diagnosis and treatment.
Answer: Torso is an anatomical term for the central part of the many animal bodies (including that of the human) from which extend the neck and limbs. It is sometimes referred to as the trunk. The torso includes the thorax and abdomen.