My professor has given me these questions to ask.
How many hits come from pay per click search engines versus conventional advertising?
How much is a good starting price for pay per click hits? For a low budget, medium budget, and high advertising budget.
I have more questions that I am looking for but I'm just trying to get a start right now.
Thanks in advance for any help.
I'd suggest that you ask about SOURCES of data at adult-industry forums. Don't think you'll get too far simply asking others to do your homework for you.
There's one dominant magazine for the indutry, that also has several websites covering various segments of the industry. They also run the industry's biggest yearly convention. You might want to start there.
Google does allow adult advertising, though it's constrained by not being able to use "adult" language in ads. (Though you can use it for keywords.) I'd imagine most adult-industry advertising is done elsewhere.