surely its got to be possible to follow someone without it showing in your following list to everybody else? We tried the sex blogging thing but it went all wrong when a post got mixed up (whoops!)...
Kinda found a solution, make a private list then add people to that list without following them. Although that doesn't really allow for interaction . In fact it feels a little stalker like.
For me, I have two email accounts - one for normal, personal stuff and then another for sexy things like LH, naughty Twitter account, naughty Facebook account etc etc. If you only have two email addresses it doesn't get too confusing.
I've also set up my browser so I can have two different instances both running off two different cookie folders, so I have a normal browser which automatically logs me into my normal stuff, then a naughty browser which automatically logs me into my naughty stuff. I did go a bit over the top with that though just because I really like Google Chrome. You could easily use say Firefox for normal stuff, and then Chrome for naughty stuff, then just have each respective browser save the appropriate details.