Why?

From the perspective of pornography distributors and consumers, all womens’ bodies exist for their sexual gratification. This includes lesbians ofc.

It’s simply manifestation of misogyny.

Or, if we turn down the tune of “All Men Are Evil” a little bit, heterosexual men find naked women attractive. And two naked women are more attractive than one.

You’re assuming men will be the only ones searching for straight porn.

It’s a fairly safe bet

Ol’ mate forgot straight women exist and use the internet lol

use the internet: totally

search porn: also true, but dramatically less than men do.