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Whistlestop tour
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“Sumer is icumen in”–as the 13th century English “Cuckoo” part-song puts it – at least for those of us in the northern hemisphere. As the days lengthen and the sun warms us, the cuckoo lays her eggs in the nests of other birds – she is the origin of the word “cuckold”, a man who is unaware of his wife's infidelities. This month we publish a fascinating range of research exploring influences on sexual behaviour exploration. In a paper aptly titled “Summer Heat”, Cornelisse and colleagues explore seasonal effects on sexual partner numbers and STI diagnoses, reporting that summer is indeed a time of higher partner numbers and STI diagnoses.1 You can …