Domain "industry experts" will throw keyword value and scientific methodology at you - it's all about finding the right end-user. I have over 5 years experience in the adult business. In that time period, reality websites have evolved into 3-6 word names. Adult sponsors don't care too much because they have affiliates that pump traffic into them. Eventually, shorter domain names will become more valuable to these sponsors.
If you have a nice two-word adult domain, hold out for the right end-user. A buyer with basic entrepreneurial vision will appreciate this name. Domain investors outside the adult industry will try and convince you it's worthless...but still throw you offers.
Very marketable domain, short and .com - $3000+
Good luck!