Being a "traditionalist" I prefer "Lambskins." Yes, they ARE from sheep intestions; they are commercially available at the local stores. If your concerns are mearly contraception and not "desease preventrion" they are tops....and they are reusable after washing.
From Junior High Days comes this ditty:
In days of old, when knights were bold,
And rubbers wern't invented
They tied a sock, around their cock
And babies were prevented.
Somehow I get an uneasy feeling that the Mudcat is being used for a college senior's demographic study in "Social Ecoology." Next questions will be dealing with "toothpaste," "detergents," and lengths of anotomical appendiges.