There's nothing to understand. You stand around hoping to get fucked once your corruption is high enough. It isn't deeper than that because you have no ability to increase the chance of GETTING fucked.
If by "chance of getting fucked" you mean :
1) Having the ennemies initiate any kind of lewd act :
-Make sure you don't have clothes (easy)
-If you followed the last thing, then engage in lewd act by turn 2 (nothing to do, easy)
2) Having the ennemies initiate in-depth act that requires high corruption
-Take a skin with a bad "Look" characteristics, such as the Spider one for instance (easy)
-Fill your deck with 1 type of lewd engage card (for only one body part), such as titjob for instance (easy)
-Find a group of exactly 2 ennemies (very hard)
-Enter combat with low value of Pleasure, to make sure it does not fill within 5 seconds (easy)
-Cycle through your deck casting your cards on one and the other (easy)
-Reach 100% corruption in combat on your bodypart (which enables what you want), you should be around 80% WP, and they should have their cum-meter around 70-75%.
-Enjoy your beloved 4-10 cut-scenes (between 2 and 5 per ennemy).
Time to execute plan 1 from gamestart:
Approximately 5 minutes
Time to execute plan 2 from gamestart:
Approximately 30-45 minutes (in order to get the lewd card, mainly)
Can be faster depending on if you are experienced with the game.
So, I either did not understand your statement, or I feel like you don't use everything you can.