It's really a matter of semantics, not science. Either party could be incapable of providing the needed input. But also yes, to address the controversiality, the withdrawal method, used perfectly, is a 96% effective [0] contraceptive method vs. 98% for condoms used perfectly [1]. Obviously the prerequisites for perfect use are different and YMMV.

[0] https://www.plannedparenthood.org/learn/birth-control/withdr... (there's no fragment, it's under the effectiveness section of the accordion)

[1] https://www.plannedparenthood.org/learn/birth-control/condom...