This part of a man's body is dirtier than a toilet bowl
Men have a body part (not the ones you're thinking) that are not as clean as you would think. So much so that, it traps more bacteria than a toilet bowl.
If your partner is sporting a beard, then you may want to get them to shave this off as soon as possible. Studies have shown that beards often attract more bacteria than the dirtiest places in the home. Why? Because facial hair forms a great refuge for these microbes.
To stem bacterial growth, there are shampoos you can use. A good scrub three times a week can at banish odours. The key to keeping a beard, keep it clean and trim as often as you can.