How do I know if he's the one? Is there a seven-year itch? Do chat up lines work and, if so, which ones? There is academic research out there that can answer these questions: Dr Luisa Dillner, author of the Guardian column 'Love by Numbers', has sifted through it to give you the facts about flirting, dating, marrying, cheating and much more...

"Absolutely not your typical self-help book. Luisa burrows into the research, emerges triumphantly bearing aloft the relevant statistics, then uses them to provide advice that is useful, yet delightfully written. Read this book for interest, read it for entertainment, read it to throw light on any question you might want to ask about relationships" Susan Quilliam

Rather than the nonsense of typical agony aunts, this relationship advice is based on scientific research, from psychology and sociology to a range of other publications. Divided into each stage of the relationship, from dating to parenthood and beyond, the Q&A format makes it perfect for dipping in and out of. The "Does Anything Eat Wasps?" for relationships.

What are the chances of making a long distance relationship work? How can I get my boyfriend to stop flirting? Is your relationship better if you don't argue? This book answers these questions.