Please provide some context around the following texts from Dharmasutra.
1) Criminal and Civil Law: "If he (Sudra) has sex with an Arya woman, his penis should be cut off and all his property should be confiscated." (Verse 12.1)
2) Contact with Impure Persons: "When a man touches an outcaste, a Candala, a woman who has just given birth or is menstruating, a corpse, or someone who has touched any of these, he becomes purified by bathing with his clothes on." (Verse 15.5)
Note: Candala is a low caste Hindu.
3) Pollution and Remedies: "An ancestral offering is ruined if it is seen by a dog, a Candala, or an outcaste." (Verse 15.24)
4) Unfit Food: "The following are unfit to be eaten: food into which hair or an insect has fallen; what has been touched by a menstruating woman, ..." (Verse 17.9)
Source: The Dharmasutras: The Law Codes of Ancient India, Oxford University Press, 1999