want to know what else i will be studying: prostitution

if someone were to go into prostitution this might be how it goes:
-first drug use=age 15
-first iv drug use=age 19
-first regular iv drug use=age 20
-first prostitution= age 20.5
-first regular prostitution=age 21
why that might be...drugs are expensive, prostitutes make a lot of money, makes sense...i guess

if someone is a prostitute their sexual activity started at a much earlier age
-first consensual sex=prostitute: age 15, not: age 16
-first regular sexual activity= prostitute: age 16, not: age 17
-first penetration= prostitute: age 14, not: age 16
either way, i am not liking these stats

clients
-are upper-middle class, heterosexual, married, highly educated, employed men.
-60% of clients are white
-main age range is 26 to 35 years old
-strictly heterosexual=94%
-working full-time=81%