@gLiTTeRz: Getting high quality instructions from pros is never cheap. Take this "erotic artist" from Holland for instance. He charges quite a sum for teaching people how to draw erotica. For one whole day (8 hours) of tutoring, a whooping 450 Euro excluding VAT/BTW tax.
http://www.fransmensink.nl/main.html (Warning: Some of his galleries are XXX).
He's probably like me (although he started way earlier). Check out his mission statement (pardon his spelling error and
trivial grammatical oopsies).
"Without a doubt; Women are my personal most favorite subjects. Especially when they are scarsely dressed.
I think they are the most wonderful creation on Earth and I never get bored with the subject...."