Jack ate more chocolate than I care to remember. He was a super ninja when it came to chocolate! I swear that little guy could move chairs so that he could climb onto the counters, reach the upper cabinets, and open triple sealed packages if it meant getting chocolate. Most of what he got was milk chocolate, thank Bob, because wonderful rich dark chocolate wasn't nearly so prevalent outside of bitter baking chocolate. And despite all that chocolate, just lived to just shy of his 19th birthday.
I wouldn't get too freaked out about a couple of kisses, even the dark ones (the amount of cocoa in those is still ridiculously low, barely more than milk chocolate. as a dark chocolate lover I'm offended that they even call them dark chocolate, frankly.)