Goodness gracious! I found why titfucks are great
But first there is the fact many softcore models that are obviously lesbos and never do scenes with men tend to look like they enjoy, or at least don't dislike inserting themselves a hard, straight... dildo!... in between their round, soft genitalia. It may have to do with the fact if you think of anything that disgusts you, you first don't want that in your mouth, then not on your face or hands, but anywhere else on your body, while still feeling incomfortable, connotes lesser degrees of yuck yuck... But I feel like over this basic observation, the call of nature seem to induce these inhabitants of no-man's land into falling for what they claim not to feel desire for.
Now the great observation just made minutes before writing this : coitus was born with genesis. Anal was obviously the first perversion. These are both a men's initiatives, because they happened when females did not seek sex and were only.. well.. that style of music, that drug, and the letter preceding its popular abbreviation in the alphabet. Handjobs and blowjobs are # 4 and 5, and are obviously later additions made when the female started to develop consent. They are a female's initiative occurring from them feeling kinky. And yes, you guessed right, titfuck stands in the middle, being both a man's move to start with, the 2nd perversion, and also became, later, a female's initiative.