the importance of a male's scent to females, such that smell was rated significantly more important for women than men. Furthermore, smell and body odour were rated as the most important physical factor for females, compared to looks for men. Further studies have aimed to understand these sex differences. Using questionnaires and self-report data, a greater reliance was found for females on olfactory cues than males. This reliance was valued for females in both sexual and non-sexual contexts. The research strongly supports the hypothesis that whilst men use more physical and visual cues, women rely more heavily on olfactory cues such as body odour that men tend to overlook. Body odour enhancement It has been established that women tend to rely more heavily on olfactory cues than males, rating those with pleasant body odour as more attractive than those with less pleasant body odour. Moreover, body odour and sexual attraction can be enhanced using artificial fragrances and dietary habits. Whilst males are influenced by body odour during selection, past research has demonstrated a significantly greater reliance on such cues by females. A dependence on such olfactory cues has led to the enhancement of male body odour to influence female attraction. Past research has shown that men using fragranced antiperspirants in videos were rated as more attractive by women than those in a placebo control condition. In addition to this, females gave higher ratings of masculinity than males, particularly in the fragranced condition. This provides evidence that females are more attentive to olfactory cues during partner selection. Aside from artificial fragrances, researchers have also begun to focus on more natural odour enhancements such as diet quality. A recent study aimed to investigate whether a dietary fruit and vegetable intake would influence female mate preferences. Its results showed that subjects rated as most pleasant smelling were those with a higher fruit and vegetable intake, suggesting male body odour can be enhanced by diet to appeal to females. Both sexes commonly use artificial scents to enhance their perceived sexual appeal. Many of these (musk compounds) share a similar chemical profile with naturally produced body chemicals. Research has found a significant correlation between an individual's MHC genotype and the ratings they assigned to certain perfumes labelled to use "for self". This therefore supports the hypothesis that perfumes can personally enhance body odours that indicate an individual's immunogenetics. However, several infertility issues may arise when