Well, I can suck on a Dove milk chocolate piece slowly and let it melt slowly in my mouth.... giving me major chocolate blast without eating too much.

I think ice cream with the fat content, will raise triglycerides too much and that makes for thick blood for several hours, and hence maybe some foot reactions.

I will only eat vanilla HagenDaz, because they don't put so many nasty additives in it. But I rarely have ice cream... if at all.
Since our new refrigerator keeps it better, I've had a little since vacation, however. But ice cream sometimes really bothers my feet.

Watch out for sorbitol in sugar free candy and foods. One mechanism of PN offered, is a sorbitol pathway (polyol), in the peripheral nerves.
http://en.wikipedia.org/wiki/Polyol_pathway

I have to say histamine containing and releasing foods and
nightshades cause me more grief than sugar. But I do avoid most treats most of the time...but after all a little now and then, I seem to crave. I am only human after all!