Can and have! Those sorts of tricks are actually the best way to do it. It's more of a mental block than a physical one.
Like in your writing there's an obvious fascination with the feminine form, a longing and appreciation of the character's body, and this is a guy's fascination, it's very characteristically male. That presence is already there and so turning it into a character, for one of your scenes, would be a matter of simply attributing this lust -to- someone rather than letting it be disembodied. This guy character's presence, his lines, his actions can be a personification of your own feelings for a big curvy dickgirl imagined to be on the other side (no one has to know that you wrote the scene as guy-on-dickgirl in your head, in 99% of TiTS scenes there is very little if any reference to the PC's distinct maleness, a scene with a dickgirl or trap or hermaphrodite or guy will all play out much the same).
And alternatively creating a scene in editing by first writing something similar enough to what you are into (in this case you're okay writing a masculine-enough dickgirl) and then parsing it down can be surprisingly effective. That can even be a collaborative effort where you write the bulk and then someone who's into the specific thing can come in, add some flavor text that appeals specifically to this or that angle. Or in the case of some things I've been asked to write before simply asking the person what they like to hear and working that in. A bit of research and a few tricks can overcome quite a few hurdles of understanding or taste.
