That's interesting.
I've found that imagining a woman without her hair diminishes her sex appeal by 90%.
Another tactic to decrease sexual desire is to read on the evolutionary biology of sexual reproduction. At some point, you start to see through the illusions, and understand that there is nothing intrinsically beautiful in human female secondary sexual characteristics; it is purely a biological toolset meant to propagate genes.
Finally, you can try to pretend that you are actually a woman. Is the normal, heterosexual woman excited by what excites you? No, so this confirms again that what makes boobs or asses attractive is merely a hormonal filter; like an option activated in a video game, and not the video game itself.
This has helped me more than one occasion in my nofap attempts. But overall the most effective tactic is simply having strong self-discipline and capacity to endure temporary pain.