Especially for us men - we are more likely to be judged by the way we smell.
There's a bunch of simple things you can incorporate into your daily time in the shower.
Soap and Water
So obvious, yet extremely important. Use a deodorant soap to prevent the return of bacteria. Splash on cold water to seal up pores and reduce sweating to a minimum.
Wash after any activity - even extended walking. Alternatively, carry baby/sanitary wipes. These won't dry you out down there while still cleaning up sweat and germs.
Natural fabrics absorb sweat better and then let it evaporate. It get ugly with synthetic materials like polyester, which leave you with a sticky sheen of sweat. Wear cotton underwear.
Further, avoid tight fitting fabrics in the summer, especially while exercising. You need the airflow to keep it cool.
However, this doesn't apply to underwear. Your boxers allow too much movement, thus creating friction = sweat. A snug pair of boxer shorts secures everything.
Not just for babies. Apply down there to soak up moisture (which breeds smelly bacteria)
Tobacco is a toxin, and your body will sweat it out through your skin. It'll be worse because of it's mixture with other chemicals in your body.
Ditto for caffeine, alcohol (especially alcohol!)and medications.
Smelly foods like meat, onions, garlic, exotic spices can cause body odor.
Reduce them and observe for differences in your body odor.
it is possible that your body can't metabolize certain aspects of your diet. it could be the choline content of your eggs, fish, liver and legumes causing a "fishy" smell.
Rancid fat in fried and baked goods can lead to body odor.
Keep it Trimmed
This prevents excess sweating. However, don't shave your family jewels - this will lead to chafing.
Zinc aids metabolism, reducing bod odor, However, do so with medical supervision. B vitamin can reduce certain secretions that can make you smelly.
Chlorophyll in your diet or chlorophyll tablets can literally deodorize your body from the inside. (MensXP.com)