To collect emails ethically on NSFW websites, it's important to get clear permission from visitors before collecting their data. You can do this by using a simple opt-in form that explains what they're signing up for. For example, if you're offering adult content updates, free trials, or special discounts, make sure you say that clearly. Avoid using misleading headlines or forcing users to give their email to view the content. Use a double opt-in method if possible so users confirm they really want to receive your emails. Also, don't hide the privacy policy. Make it easy to find so users know how their data will be used. This helps build trust and can lead to better results long-term. What other ways do you think email collection can be done without crossing the line?