I just found the funniest web site.
www.bedposted.com - it promises to track your sex life and sexual partners. I'm a statistics geek so I'm going to join up and give it a go for the fun of it!
I think it will dovetail nicely with another site I've been using about 4 years now.
www.mycycle.com - it's a site that tracks your periods and predicts ovulation and bleeding. Now of course it's meant for couples trying to have kids but I've set up the email notifications to warn me a few days before ovulation. Cause that's my mega-horny time and also the best time to do paid sex work so that I enjoy it.
I've then set it up to tell me about a week before my period is due so that I can remind myself why I'm behaving like a cuntyface - ahhhh, bad PMS. Then I usually lay off any sex work for a week or two.
I've been using it for years now because you can always tweek the notifications so that it suits being in a relationship - you can warn your other half - which has been useful in the past!