Maybe I *am* into cock birth if it's eggs...keep thinking of myself on all fours, belly hanging, my cock inhumanly swollen, while someone behind me strokes and squeezes the eggs along my shaft and out through my dick hole, like they're milking me.
Or I'm seated in their lap; one of their hands gently pushing against my belly - more roughly as my stomach deflates and the eggs come out slower - while the other works my dick, like they're jerking me off, roughly forcing the eggs out of me; my mutated dick can still just barely squeeze them out, the stretch of them as painful and burning as it is pleasurable, made all the more agonizing by my partner's rough handling.
Maybe I can't even orgasm from it; hopelessly aroused, constantly at the edge, always thinking this is it whenever an egg squeezes out... but it never comes. I sit there whining and frustrated, receiving no shortage of stimulation, but unable to get anywhere so long as the eggs are coming.
Maybe when the last one pops out I can finally let loose; a huge torrent of cum, meant to fertilize all the eggs I've just laid, pulses and pulses through my cock for minutes. Drenched in a pool of my cum, I fall over utterly exhausted and sore, completely empty and finally relieved.
That is, until the next time my belly swells with another clutch.