You are free to charge whatever you want for the content you sell and the interaction you provide. You will want to price your time and content at a level that attracts donations without selling yourself short. The key to success in securing repeat, recurring customers (that relationship thing again). So you will want to produce high-value, high-quality content and make your interactions meaningful. And don't be afraid to negotiate (it can be fun). When a guy approaches you to negotiate a donation, take that as an opportunity to find a mutual comfort level. Once that is established, and he is satisfied that you deliver as promised, he'll likely come back to you again and again and tell the other guys what an amazing woman you are in your reviews.