I´ve been there a couple of times and never checked out the sex/rubber shops though but we lived in Weissensee which is in the old east but pretty darn nice. Had a hotel built in the 60s and remodeled in the nineties so it was quite fresh and didnt cost an arm and a leg. The restaurants well up there they were okayish but downtown you can find really great restaurants.
Too bad both me and my girl are working then otherwise we would join you. It isnt exactly far from the south of Sweden.
To check out well the TV tower has a spectacular view over Berlin and the Lipstick and Powder"can" whatever that is called those two churches that was destroyed during WW2. Brandenburger Tor is pretty spectacular especially during the night and those Museums are aplenty and pretty darn spectacular if you ask me and like to do those kind of stuff. Take a Bus tour. I have done those in most cities I have been to and you get to learn loads.
Cant help you with the really fun stuff there though sadly