Don't worry and let's figure it all out.
Are you using 'detailed stats'? This function can be enabled in the settings. Girls characteristics will be visible on this panel. The point of this mini-game is to keep the selected for a game toy indicator within the pink strip. Take the feather and point it at different zones. Its indication will appear on the 'touch' line. If the indicator does not reach the pink strip, then try increasing the intensity in the tab on the right. Play around with different toys, each of them has its own specifics and perks. Try using through clothes or on piercings. You will also notice that with growing arousal the girl's characteristics change and the toys used need to be regularly readjusted or replaced with others to meet her needs at a particular moment.
But if smth is not shown, or all indicators go up as you say, please make a screen with selected traits and detailed stats bars with toys used.