It depends upon the question. If the question was between those two choices, I agree, but the answer may have little to do with sex. I suspect there is a higher probability of a guys divorcing (with all the financial ramifications, effects on his children, etc.) his wife and moving in with the person he is having an affair with than with a pro. But that is a loaded question. You are only giving her two choices. If you asked her, for example, this question: "Since you have no or little interest in sex, how would you want your husband to take care of his sexual needs?" The answer may be " He can masturbate in the bathroom while reading dirty magazines as long as he keeps them out of sight and doesn't tie up the bathroom when I need it."