Male porn performers come in two different varieties. The mechanics who come in, fuck the girl routinely like a piece of meat (and she could be any girl of any age with any kind of body) and leave. Even if the girl has some special asset, such as the big tits of our niche, they may spend a minute on them listlessly and move on to getting a blow job. These are the guys who often equate fucking on-camera with a pay check.
Then there are the guys who are passionate and super-horny about tits and enjoy big-titted girls. They spend time sucking and exploring the girl's boobs before they get into the blow jobs and fucking. And there is nothing that says "I worship big tits" than blowing your load on a big pair.
When it comes to busty girls, they need a guy fucking them who really is crazy about big boobs or the scene becomes a generic porn video. In other words, the girl doesn't need big tits.
When Robert (who picked up the nickname Mr. Trousersnake from his role in the SCORE movie Busty Euro Maids) was brought in to fuck the hot Czech bra-buster Bozena, he had that extreme lust for her tits. That's obvious from the first few seconds in this video from the DVD Voluptuous Xtra 9.
In the opener, he's comparing Bozena's tits to some girl's tits in a TSG magazine he's looking at. He has to see Bozena's tits and his sexual aggression builds until he's got Bozena naked and is straddling her chest, his cock sliding between the brunette's heavy, natural jugs. In fact, there's at least three different times in this video when he's banging Bozena's tits, not just once like he's following some formula.
Bozena is a very quiet woman, and like many girls in porn, she's compliant, and submissive to his directions and orders. (There are noticeable exceptions in the big-boob world such as super-aggressive Kianna Dior and Daylene Rio.) He's verbal and sexually bossy while Bozena is happy to follow his lead. She needs and wants to be controlled and Mr. Trousersnake is good at controlling her physically and verbally.
When he fucks the shit out of Bozena on the floor, his lust to sexually dominate and own her is anything but mechanical. And with a body like Bozena's under you, tit men will identify with this one-track lust.