Probably just “regular” mammals.

Mammals have a lot of weird dick things. Some bats have gone from penetrative sex back to just like touching genitals because their dicks are so huge they literally don’t fit anymore.

livescience.com/…/bats-with-weirdly-giant-penis-h…

So having a impractically huge dick was more important for some reason.

Guess something similar happened with hyenas vis-a-vis having become matriarchal at some point.