You probably know sweet food attracts ants, but in this case the ants are the sugar!
![Ant Sugar by Asobi Tsuchiya](http://cdn.rekkerd.org/img/random/ant_sugar.jpg)
I don’t know if any other languages have this saying, but in the Netherlands we call extremely sweet (literally and figuratively) things “mierzoet” (mier = ant, zoet = sweet).
Check this cool Flickr photoset of Sugar Ants by Asobi Tsuchiya.