While I understand and agree with your sentiment regarding the mislabeling, my original point was that even "pure" penis expansion material predominately features futanari protagonists nowadays -- that is, a futa's penis growing.
Getting back on topic, here's a classic clip:
https://i1.yuki.la/4/d5/c01482475bc2...eea9fad54.webm
(Is there any reason I cannot attach MP4 files?)