and affects partnership," said the researchers from the University of Dresden.
"Men exhibit much less explorative sexual behaviour and women are affected in a way that they feel less secure about their partner. Our results show the importance of the sense of smell for social behaviour," they said.
Phillip Hodson, a psychotherapist and author of How 'Perfect' Is Your Partner?, described the new study as "a very astute piece of work".
"Instead of testing pheromones which control moths but may not control humans they've studied the smell-disabled to see how they differ from the rest. And both sexes with faulty noses appear to be less than sexually confident," he said.
"We know the nose is a sexually interactive organ: it tends to run when we get aroused and often people sneeze when extremely excited," he said.