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.
Other crucial factors to keep your other half happy include admitting blame after an argument, sharing household chores and sex twice a week.
The list of 20 factors is designed to ensure that couple spend time together and are openly affectionate.
However, having children was not among the top 20 factors in a survey of 2000 adults.
Sharing two hobbies, saying 'I love you' at least once a day - particularly before you go to sleep - and regarding your partner as your best friend are also signs of a lasting liaison.
If both partners work full-time that is also seen as an added bonus, the survey found.
It also emerged three quarters of the adults polled said for a relationship to be perfect the couple didn't necessarily have to be married.
The profile was created to mark the launch of the Two Together Railcard in Britain, which saves named passengers a third off rail travel when they travel together.
Spokesman Andrew Robertson said, "It's encouraging that today's perfect relationship is based on simple things such as meals out, travelling together to new places, daily kisses and telling each other 'I love you' before going to sleep.
"It's also clear that Brits aren't demanding lavish holidays or expensive presents for a relationship to be deemed faultless – it's more about appreciating the time you have together and telling each other you love them."
The exemplary couple also stated 'talking' as the top activity they like doing together the most and travelling together to new places.
But it's not an entirely dreamy existence: bad driving, leaving dirty clothes on the floor, arguments over spending on the monthly budget and lack of washing up were all listed as things that irritate us most about our partners.
Top 20 signs of a perfect relationship, ranked in order
1. Admitting you're wrong after an argument.
2. Saying 'I love you' before you go to sleep.
3. Sharing household chores.
4. Having regular date nights.
5. Taking turns to cook.
6. Sex twice a week.
7. Sharing the washing up.
8. Having same taste in films.
9. Meeting through mutual friends.
10. Three year and six month age gap.
11. Two shared hobbies.
12. Sharing three mutual friends.
13. Three date nights a month.
14. Being best friends.
15. Kissing five times a day.
16. Cuddling five times a day.
17. Having one romantic meal a month.
18. Two weekend breaks a year.
19. Both work full-time.
20. Having the same taste in food.
The Telegraph, London