Abstract：
:Mouth to mouth sexual kissing is seen in more than 90% of human cultures. Various theories have been put forward to account for this but none offer a full explanation within an evolutionary framework. As mouth to mouth sexual kissing exposes each participant to the diseases of the other, it must confer significant benefit. Human Cytomegalovirus (HCMV) is a ubiquitous infection that carries a severe teratogenic risk if primary infection is acquired during certain critical periods. As HCMV is present in salivary gland epithelial cells and sheds from periodontitis induced lesions, female inoculation with a specific male's HCMV is most efficiently achieved through mouth to mouth contact and saliva exchange, particularly where the flow of saliva is from the male to the typically shorter female. The current hypothesis proposes that mouth to mouth sexual kissing enables females to control when they become infected with a particular male's HCMV and so protect their offspring from the threat of teratogenesis from primary infection during vulnerable times in their development. Females only gain this benefit if they also avoid becoming infected by other males. Hence HCMV induced teratogenesis is a strong viral pressure towards the development of monogamy as well as kissing as a behavioural strategy to protect against it.
journal_name
Med Hypothesesjournal_title
Medical hypothesesauthors
Hendrie CA,Brewer Gdoi
10.1016/j.mehy.2009.09.033subject
Has Abstractpub_date
2010-02-01 00:00:00pages
222-4issue
2eissn
0306-9877issn
1532-2777pii
S0306-9877(09)00638-0journal_volume
74pub_type
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