Fellatio among spiders!
Not sure what is more disturbing, that some female daddy longlegs will perform fellatio (perhaps to avoid potential violence from males) or that scientists are interested and get funded for such a topic. #stem #wtf

https://www.scientificamerican.com/article/daddy-long-legs-perform-fellatio-and-other-wild-facts-about-how-these-arachnids-mate