Why not?

Deciding that a round two is in order, you take a seat on the bench, wrapping a hand around the firm shaft between your legs. A satisfying slapping sound fills the room as you start to stroke your hand up and down the stiff organ, your foreskin spreading open and sliding down to reveal the head with each motion, before moving back up and closing when the pressure is released.

Even given the recency of your last orgasm, pleasure is not far away, and in a haze of lust you use your other hand to give one of your nipples a quick pinch. The sensitive organ's pleasurable feedback is instant and effective, your mind clouding over with arousal as you give in to the sensation, a massive jet of semen shooting across the room, leaving a long, white line across the grass. Rope after rope of the thick liquid explode from your cock, until a reasonable amount of the grass in the room has lost its green color, the line almost resembling one that would be found on a soccer or football court.

A pressure rises in your enlarged breasts, and starts to flow outwards with the cum, a thinner white liquid dripping from your nipples. The milk leaves white lines on your body, not as thick or pronounced as those of your semen, but still quite noticeable. After several seconds of your body expelling fluids, it finally slows to a crawl, but the steady flow of liquid never quite stops coming from the ends of your breasts, which feel even heavier than before. Similarly, though your cock loses its erect stature and hangs between your legs, it's still dripping drops of semen at a reasonable rate.

You lay back on the bench, basking in the afterglow, and try to decide what to do next.