That's actually an excellent way of explaining it.

Though it's frustrating that it's pornhub specifically, because referencing pornography can be awkward or impractical in workplace contexts.

GrubHub?

StubHub?

A safer-for-work version might use:

fried chicken --> KFC

bat --> bathub

Wow, I didn't know that, that thing is supposed to be a hub for bats.... Learn something new every day!

I use video --> youtube

"Porn" is a genre of video and YouTube is better known than pornhub.

But the whole point of the "porn --> Pornhub" half-joke analogy is that it shares the word "hub" with Github!