The Barry White Tunes Didn't Help?

Apparently not. As this article describes, it takes a team of several to help these white rhinoceri mate.

Although the problem in this particular case involves a foot injury to the female that leaves her unable to be mounted by the male without risking serious injury (I would have thought the horns would have been part of the problem as well), another reason rhinos need assistance in this area might be that they are really, really ugly and they don't drink.