2.—Capacity to buy and sell is regulated by the general law concerning capacity to contract, and to transfer and acquire property.

Provided that where necessaries are sold and delivered to an infant, or minor, or to a person, who by reason of F2[…] drunkenness is incompetent to contract, he must pay a reasonable price therefor.

Necessaries in this section mean goods suitable to the condition in life of such infant or minor or other person, and to his actual requirements at the time of the sale and delivery.