Kinsey's scale of heterosexual and homosexual responses, as outlined in <i><a href="https://en.wikipedia.org/wiki/Sexual_Behavior_in_the_Human_Female" class="extiw" title="en:Sexual Behavior in the Human Female">Sexual Behavior in the Human Female</a></i> (1953)
<a href="https://en.wikipedia.org/wiki/User:Moni3" class="extiw" title="en:User:Moni3">Moni3</a>
1948, 1953
<span class="int-own-work" lang="en">Own work</span> (<span lang="en" dir="ltr">Original text: <i><bdi lang="">self-made</bdi></i></span>)