Do you mean the controller vibration or the rhythm circle? The former has a vibration "love" option in the settings, the latter is something you specifically have to purchase and can be avoided entirely. If it's something else, let me know and I'll see if I can add an option.
Not too sure if this is a bug, or a strong buggy cheese, but if you unlock the "multiple orgasm ( 8 - 10 )", get grab by a tentacle, you can pretty much skip the whole damaging, and/or the whole stage by repeatedly doing the same.
Why? Enemies can't repeatedly grab you, making you invisible throughout the whole map (The one you carry with you.)
Also, your mini boss has a bug, if you push him into a corner and butt slam him. There is a chance you can soft lock him into a position that he can't do anything. Same goes for crouching and attack. He can't perform sex and your pretty much invisible on that same boss battle.
Over all, the game is good and I love the animation you made within the game