I can, actually, see the metaphor there. Chocolate ice cream makes some people uncomfortable when they eat it (lactose-intolerant) and can be life-threatening for others (severe allergies involving anaphylactic shock). Other people can't imagine life WITHOUT chocolate ice cream.

Voila, the complete range of reactions to the Gun Issue, from horrified revulsion and physical withdrawal to strong attraction and interest. (Personally, I fall somewhere in the middle: chocolate isn't my favorite flavor, but neither will I turn it down, since some ice cream is always better than no ice cream. ;)