"The Tin Men" remembered by an Old Geezer
Back in 1965 I was programming (as we called it then) a KDF-8 (RCA-501?) for Schweppes in London. (This was proper coding -- octal machine code, no assembler, no compiler, no operating system.) The KDF-8 filled a large room and was less powerful than my phone.
Anyway, 1965 saw the publication of a great comic novel titled "The Tin Men" by the brilliant British author and playwright Michael Frayne. It was -- and is -- as funny as hell and, yes, the software was particularly good at pornography for all the reasons suggested in the comments above. (See: https://en.wikipedia.org/wiki/The_Tin_Men.) Remarkably, it's still in print: www.amazon.co.uk/Tin-Men-Michael-Frayn/dp/0571212662.
And before you ask, 50+ years on, and in spite of a different second career, I can turn out decent apps in C# and JavaScript... 8)