The Rishis have laid the command upon all men that maidens should never be bestowed upon persons unless the father are eligible. The daughter is the root of desire and of descendants of the collateral line. This is what I think.
नानिष्टाय प्रदातव्या कन्या इत्यृषिचोदितम्। तन्मूलं काममूलस्य प्रजनस्येति मे मतिः॥