Dating sites allow you to send messages to potential life partners. But it's safe to say that the more emails/messages a woman gets, the less likely she is to open emails. Subject line could be a key to getting a woman to open your email, and then, a first paragraph that entices her to get to know you better.

Of course, once she reads your email or your message, the real hard part begins: falling in love and getting her to fall in love with you. But to get to that point, a great email subject line and opening paragraph will open the door for you.