I agree that it is a normal scent, and every man is different. It depends on what his diet is like. For example, if he eats a lot of garlic, spicy, or fatty foods, it may have a scanty, bleach-like smell to it. If he eats mostly fruits and veggies, it will be more of a sweet scent.
I think it's a normal thing. But it's mostly about what he eats or drinks a lot of. I'm not saying he drinks chlorine, but sperm can smell different depending on what the guy eats. I've learnt that anyway.