When a potential partner detects these signals (supposedly by smelling them), it creates 'chemistry'—an innate sense of attraction that can't be credited to your height, lack of debt or ability to play bass guitar.
Some dating services have tried to play off this theory in the past.
Also, if this scientific approach to finding love doesn't work out, that's OK too.
Or is our romantic compass something that's ingrained into our very being?
The theory is that your body produces chemical signals, as determined by your DNA.
If you mate with someone who has different DNA to yours, it means that your offspring will have a combination of the two.
Should there be some change in the environment, your offspring are more likely to have something in their genes that will allow them to survive.
However, our ability to smell each other is often confounded by the deodorants, perfumes and colognes we wear.