Well it wouldn't be down there, per se. Sugar in the vag is a terrible idea! lol. I'm talking maybe little dollops on the nipples, or a trail down the stomach. Simple. lol
Oh. XD Well, from experience I can tell you nutella doesn't lick up as easily - it generally tends to cause a problem with, ah, leaving a trail of stickiness. And as hot as that might sound, unless you're really into WAM stuff, you don't wanna be sticky and slimy during sex XD
*shudder*