They found that men who performed fewer mate guarding behaviours had a greater concentration of sperm, a higher percentage of motile sperm and sperm that swam faster and less erratically than men who performed more mate guarding behaviours.
They found that men who performed fewer mate guarding behaviours had a greater concentration of sperm, a higher percentage of motile sperm and sperm that swam faster and less erratically than men who performed more mate guarding behaviours.