Virex Valor XL WEDNESDAY, Jan. 13, There's no proof that over-the-counter sexual enhancement supplements for men work, and some are potentially dangerous, a new study reports. Thousands of years before Viagra, men were consuming everything from horny goat weed to powdered rhino horn in hopes of boosting sexual performance. The remedies persist for men who can't get their hands on prescription drugs like Viagra or who prefer "natural" cures. Virex Valor XL Reviews Penis-lengthening surgery is also an option for men, but it is a highly controversial procedure. The American Urological Association says a common form of lengthening surgery has not been shown to be safe or effective.