The Science of Falling in Love: A Closer Look
The common belief that women fall in love faster than men is a widely held stereotype. Many people assume that women are more emotional, more likely to get caught up in romantic feelings, and quicker to express their emotions. However, according to scientific research, this perception might not be entirely accurate.
Dr Karl Kruszelnicki, one of Australia’s most respected science communicators, discussed the topic on the Love Stories podcast, offering insights into how and when people fall in love. His findings challenge some of the long-standing assumptions about gender differences in romantic relationships.
When Do People Fall in Love?
According to Dr Karl, men tend to fall in love earlier than women. He explained that, on average, men may express their feelings of love around the three-month mark of a relationship, while women often take a bit longer. This timeline is based on peer-reviewed studies focused on Western populations, which suggest that men are more likely to say “I love you” first, typically 10 to 15 days before their female partners.
This three-month point is significant because it marks a stage where many people begin to feel genuine romantic attachment. However, it’s important to note that these findings are specific to certain cultural contexts and may not apply universally.
Why Might Men Fall in Love Faster?
While the exact reasons remain unclear, several theories have been proposed. One is an evolutionary perspective: historically, men faced greater competition for mates and may have developed quicker attachment mechanisms to secure a partner. Another theory relates to social factors—women, who have traditionally had more to risk in relationships, such as physical safety or financial dependency, may have evolved greater caution before committing emotionally.
There’s also the possibility of socialisation. Women are often more practiced at examining and articulating their emotions, while men may be less inclined to do so. This could mean that men feel love earlier, but women are better at recognising and expressing it.
Real-Life Examples
In the case of Nas Campanella and Tom Oriti, Tom admitted on the Love Stories podcast that he fell for her shortly after they met. “I felt it very early on,” he said, “but I just didn’t tell you that.”
This personal account aligns with the broader research, suggesting that men can develop feelings quickly, even if they don’t always express them immediately.
Arranged Marriages and Love
Another interesting point raised by Dr Karl was the role of arranged marriages. In some cultures, couples enter into relationships without initial romantic feelings, yet these marriages often have lower divorce rates compared to those formed through romantic courtship. This challenges the idea that love must come first for a relationship to succeed.
In many parts of the world, love is seen as something that develops over time through shared experiences, mutual care, and commitment rather than being a prerequisite for marriage.
Does It Matter Who Says ‘I Love You’ First?
Research suggests that the timing of expressing love can have an impact, but not necessarily in the way people expect. Women tend to be more cautious about saying “I love you” first, considering whether the feeling is real and whether the timing is right. Men, on the other hand, may be less hesitant.
However, Dr Karl notes that only one study on the timing gap has been fully replicated, and there is still much we don’t know about the science of love.
The Chemistry of Love
When we talk about falling in love, we’re essentially talking about a complex interplay of brain chemicals. Dopamine, serotonin, and oxytocin all play roles in the experience of love, but the brain’s complexity means that no single chemical explains the entire phenomenon.
Falling in love activates the brain’s reward system, suppresses critical thinking, and triggers the release of bonding hormones. These effects typically fade after about three months, which may explain why the three-month mark consistently appears in research on love.

Frequently Asked Questions
Do men fall in love faster than women?
Research from peer-reviewed studies of Western populations suggests that men tend to experience and express love earlier than women, typically around the three-month mark. They are also more likely to say “I love you” first, on average about 10 to 15 days before their female partners.
How long does it take to fall in love?
Based on available research, men in Western populations tend to fall in love at around three months into a relationship. Women may take slightly longer. However, these findings apply to a specific cultural context, and in many cultures, love is understood to develop gradually within a committed relationship rather than preceding it.
Why do men say “I love you” first?
Research suggests men tend to say “I love you” earlier than women, by roughly 10 to 15 days on average. Theories include evolutionary explanations around mate-securing behaviour, and social ones around women being more cautious about emotional vulnerability. The science doesn’t yet offer a definitive answer.
Is there a formula for falling in love?
Dr Karl’s answer is a clear no, though patterns do exist. Love involves thousands of neurochemicals and hormones, varies enormously across cultures, and is influenced by personal history, attachment style, and circumstances. The three-month timeline is a statistical average from a narrow population, not a universal rule.
Do arranged marriages last longer than love marriages?
Some research suggests arranged marriages in certain populations have lower divorce rates than non-arranged ones. This may reflect cultural, religious, or social factors around commitment and support structures, rather than the presence or absence of romantic love at the start. The picture is complex and varies significantly between communities.
To hear more stories about who fell in love first, listen to The Australian Women’s Weekly Love Stories podcast.






