Nazir 4: Samson Didn't Vow

2 mishnayot - beginning with taking a vow like the nezirut of Shimshon (Samson), with different phrasings that all refer to him. But why use all the details?! Also, what's the difference between this kind of nazir and a regular nazir? Beginning with sacrifices, and hair-trimming, and the issues of becoming impure from contact with the dead. Plus, of course, the way one becomes a nazir. Also, the story of Shimon HaTzadik and the beautiful nazir.