I think part of this has to do with education.

I tell my patients they aren’t sterile and shouldn’t consider themselves sterile until they have 2 specimens without sperm. I tell them the first should be at 4 weeks and the second at 8 weeks. If either has any sperm, they need another 4 weeks after.

I try to make it easy for them. Rather come in and leave a sample I look at on our microscope or go to a lab and drop it off.