Hi! The first idea you should always plant is - 'You are a sissy.' Then, you need to put your sissy in the dungeon. Fast forward five days, you r sissy will accept the 'You are a sissy' idea on their own. After that, that accepted idea will generate one brainwash point per day. Next, make your sissy accept 'You need to be brainwashed' idea, it will generate an additional brainwash point each day. You won't ever run short on brainwash points, because you'll constantly be getting two bw points a day. They can pile up pretty quickly.
Wait for the patch, though. It will be much easier to defeat your sissies in the dice game from now on, which is the main way to get them into the dungeon.