If anyone else is looking for this option, go to the mixed baths in tale and talk to annie until you unlock her shop, then buy the contra-potion. Luckily it's 11g and permanent. Just wish it was a setting. Hopefully next game..
You probably need to increase your attitude to more slutty. Basically click any options to have sex, the easier one at the start is to keep going with the shy guy in the random forest encounter where you'll go to the lake. Also the Black Stone Shrine in the forest, i think will also help if you do the "test" and answer bad girl?