Smelly balls can be a problem for men especially while having Sex. You can do few things to "make your balls smells like flower", just kidding. Definately, you can remove odour by following few simple steps like:
Shove your hands in there, and clean it while having shower. Grab a wash cloth and rub (scrub) it all over. A wash cloth, not a hand towel—there's a whole world of difference. You could obviously pick the loofah next, but chances are, you'd find it too rough. So let it be, a wash cloth will toss all your dead skin cells away anyway.
Shower Post A Workout Too.
This may sound uncanny, but most men don't take showers post workouts. Maybe because they're lazy or just plain unhygienic (and that's not cool). Sweat is the most common odour-causing element up your crotch, which is obviously produced in plenty through a stressful (or not) workout. Point being, you need to knock out sweat before it's too late.
And Post The Shower, Dry Yourself.
It's simple—grab a clean towel and rub yourself dry. Since moisture, ideally, is a crucial combo to bad odour in your sack, ensure you're wading it away by towel-drying yourself. Plus, post that, allow yourself to air dry for a few minutes too.
Stuff Cooling Powders/Creams Up There.
Dead sure you're into nothing but putting clothes on post a shower. All of us are. But, don't be proud of that. You need to sprinkle some moisture-wicking powder or apply a soothing/cooling cream up the gonads, right after you're done drying. These products will prevent wetness and chaffing up your crotch, resulting in desert-like dryness all day long.
Manscape Daily.
A lot of moisture gets sucked into your bush daily. Which, eventually, produces sweat and turns into a breeding ground for odour-causing bacteria. So be smart, and shave it. Right from the roots (using a razor/trimmer), and all the way over. Besides, this would also eliminate chances of a prickly jock itch.
Lose Weight For Your Own Good.
Not every guy is fit or toned to the gods. A lot of us are obese, bigger than usual or just plain overweight. More weight means more fat/scraggly skin in and around your sack. Which to be honest, does result in excessive friction, eventually again, producing sweat. Result? Bad odour. So basically, chop the junk off your life (the food, we mean).
Lastly, Don't Stress.
Stress and anxiety do trigger your annoying sweat glands. More the sweat, more the number of bacteria, more bad odour. Just chill the hell out and live life king-size, bro.