Many men (especially teenagers) or female to male transsexuals want to see an increase in body hair. There are a number of ways to get this done.
Rogaine (Minoxidil) is used to increase hair in the scalp area. However, Rogaine can also increase body hair, although you must be careful and not apply to much to any area since it can cause blood pressure and hear rate problems. The following mega discussion thread on many peoples' attempt at growing a better beard using Rogaine says it all.
Some people move body hair from one area to another. Hair transplant surgeons can often do this quite skillfully, but it is important to choose someone with significant experience at this. Body hair anagen and telogen times vary depending on body area, and body hair coarseness and length also varies, so you cannot just move any body hair to any area.