That smell after...

I've been having sex with this guy for a couple months now and my vagina smells rancid EVERY time after. Like I have to spend an extra 10 minutes in the shower trying to get that smell out. So not sexy. He definitely doesn't have a healthy diet but he never smells bad! Nor does his dick taste bad! I lead a very healthy lifestyle in diet and exercise, way healthier than the average 25 yr old, like I shit 2x a day healthy. lol. I'm normally always good down there. This is all him and I don't know how to tell him in a nice way that he needs to get his shit together.😩💀🤦‍♀️🤷‍♀️