https://phys.org/news/2018-06-fussy-fruit-flies-bad-genes.html

Robert Dugand, from the Centre of Evolutionary Biology said the study aimed to determine why the females of many species are so choosy over which male they mate with.

"If females persistently choose particular males based on certain characteristics (e.g. size, smell), you would assume that the continual selection of these traits should eventually erode any genetic diversity in males," Mr Dugand said.