Hi welcome to Health care magic forum.
Thanks for calling H.C.M.Forum.
You are 17 years old, male, your left testicle seems a bit smaller, than the right, and is more sensitive, and loose. Left side of your body is sexually sensitive.
Morphologically human body is a miracle, actually right testicle should be a bit loose, and down, due to the presence of the
liver on right side. there is a condition where all the organs are reversed from right to left, means liver on the left side and
spleen on the right side. in this case it is possible.
It is also possible in normal persons also with out any reason.
Some parts of the body are sexually sensitive for that you need not worry about. One will have more enjoyment on that side.
Wishing that everything will be fine.
Best regards.