Here are some random conclusions I have drawn after using Senior Sizzle off-and-on for a few years:
1. It's usually the spontaneous meets that lead to sex! I've had some wonderful encounters where the message exchanging has been minimal and the meet up has occurred very soon into the contact. Spontaneity is sexy!
On the other hand, I have found that when I have exchanged millions of messages with someone over a long period of time, it often goes nowhere.