Odor during sex

Hi guys, this is very TMI. when we have sex i have been noticing my wet/come smelling a little bad, its only past 4 days. I have never experienced anything like this. I am a very clean person, i take a shower everyday and wash my privates through out the day. This is very unusual for me. Its not all the time, its only when we have sex and only my wet/come. Other than that i don’t have any weird discharge or anything. Any idea why its happening,