I had been suffering from this me and my husband been together 10 years and have a kid together and I never experienced it before. The semen burns after sex but if he doesn’t ejaculate it doesn’t hurt. I went to the doctor and they tested me and it’s a rare bacteria that they usually don’t test for. I had been takin antibiotics for strep throat and got a uti and it can cause the rare bacteria and it can pass to the guy and then back and forth it both isn’t treated. You get it if you get lots of Utis or bv. The rare bacteria is called Ureaplasma like I said they usually don’t test for it cause it’s rare but after the pills they gave me Everything is fine.