Five kisses a day and 3.5 years age difference - the perfect relationship

Updated September 11 2014 - 10:13am, first published August 12 2014 - 9:00am
<i></i> Photo: iStock
<i></i> Photo: iStock

Five kisses a day, a three and a half year age gap and a romantic meal once a month are among the key ingredients for a successful relationship, a survey has found.