Personalization in subject lines can be a smart idea, especially in adult email marketing. Adding the user's name or hinting at something personal may help your email stand out in a crowded inbox. People are more likely to open something that feels like it's speaking directly to them. However, because it's the adult niche, you have to be careful not to make it too aggressive or spammy. Some email platforms may flag overly personal or suggestive subject lines. It's a good idea to test a mix—some with the user's name, some with location, and others more general. Then compare the open rates. If personalization leads to higher engagement without raising complaints or getting blocked, it's worth using more often. Different angles can catch different moods, so testing can help find what works best for the offer. What are your thoughts on testing personal touches in your email subjects?