How to stop the body hair growth permanently. Plz help sir. My second question is- how can I reduce the hair density that I have.

Tough question. See doc.Men can decrease body hair by taking estrogen-like compounds, but enough to do that also causes feminization (ibreast enlargement).Not all of it goes away (women have body hair too).The best answer is to consider targeted laser hair removal which is permanent. There's waxing, electrolysis, depilatory creams,too. Just think in 50 years you may be sad because you don't have enough hair!