Journalism professor Dr. Katja Thieme had made the comment in a Twitter post she shared criticizing swimmer and women's rights advocate Riley Gaines.

Thieme, who teaches at the University of British Columbia, had been tweeted a video of Gaines explaining the effects of having to compete against transgender swimmer Lia Thomas.

In a lengthy response to the video, in which Thieme blasted Gaines, she also tweeted: 'Hey, want to know one of my all time excellent parenting ideas?

'Let. Little. Children. See. Penises. And. Vulvas. Of. Various. Ages. And. Sizes. In. A. Casual. Normalized. Totally. Safe. Way.'

She continued: 'The world will thank you for it. And so will those children when they grow up.'