Local sprays usually contain local anesthetics that reduce hypersensitivity. They also exert a strong placebo (psychological) effect. However, you must use approved brands made by reputed companies with the ingredients list printed on the canister, or these can be dangerous. The rubber band method is crude and can cause complications. It is better to use FDA-approved type penile tension rings. Generic brands of Viagra made by reputed pharmaceutical companies ought to be quite safe. If none of these works, you will finally at least acquiesce to an andrology consultation, I expect!