Everyone knows there are a few hot-button topics that can make any conversation go nuclear. Religion. Health. Politics. Death. But when it comes to the most difficult conversation you can possibly have, a survey from Wells Fargo & Co found one clear winner: money.

Money landed right at the top, says Karen Wimbish, director of retail retirement for the Charlotte, North Carolina-based bank. "I don't know that we expected that." In fact, 44 percent of Americans point to personal finances as the most challenging chat anyone can possibly have. Even the existentially terrifying topic of death, which you might expect to top such a survey, comes in second at 38 percent. Also far behind are perennially explosive topics like politics at 35 percent, and religion, 32 percent.