If the husband himself is the principal obligor in the contract, that contract falls within the term "x x x x obligations for the benefit of the conjugal partnership."

Here, no actual benefit may be proved. It is enough that the benefit to the family is apparent at the signing of the contract. Where the husband contracts obligations on behalf of the family business, the law presumes, and rightly so, that such obligation will redound to the benefit of the conjugal partnership.