COmedic17
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The MSDS for Clorox bleach does recommend drinking milk or water as layperson first aid, but because bleach is not even particularly toxic and ingestion generally requires no treatment at all, this is really a moot point. Give it or not, it doesn't matter.
If we are talking about more caustic agents - the kind that actually does require medical treatment - attempts at dilution or neutralization are contraindicated because it increases the risk of aspiration and thermal injury.
This article from Medscape is well-referenced:
Poison control, the CDC, and other government websites say to consume milk, but not induce vomiting.
And milk is not used to counteract a base or acid, or to simply dilute. Perhaps your confused why it's recommended. It coats the stomach, which needs lactase to digest lactose, which in turn slows down absorption in the stomach (since this digestion requiring the enzyme lactase takes longer), this slowing down absorption of what is swallowed. Hence why it's used for chlorine ingestion as well. Here's some resources recommending milk for ingestion poisonings.
http://m.medlineplus.gov/ency/article/002488.htm
http://azpoison.com/sites/default/files/poisonology_bleach.pdf
http://www.atsdr.cdc.gov/MMG/MMG.asp?id=927&tid=192