Hey there!
First of all, interesting links. I've probably read about Yummy Cum before.
I can't say for sure about these products; I'm keen to test them, but for now my monetary situation calls for saving money on all causes.
Juicing pineapple would be one thing by the way; just natural pineapple. Well, sure you need a juicer. I guess one could use a decent electric mixer, cut the pineapple and make it to a juice.
Overall, these quick changes interest me in a way. But in the long run so to speak, lots of vegetables and fruits will serve your body better. And make your cum tasty. My own personal experience has been that when I'm eating more vegetables and fruit and also drinking plenty of water, it really shows up in the consistency of the semen, how it looks and probably tastes. (Not like I taste my stuff all the time!) The scent of your man juice is also a relatively good factor.
I've had some supplements and they've probably helped me for a better tasting cum. Propolis / bee pollen extract for one example, of course not very good if you're allergic to bees. Zinc is very important for the health of your swimmers. Dopa Mucuna is supposed be good for semen production, has helped me in mental department as well. (Dopamine pre-cursor, so carefullness comes to play with Dopa Mucuna.)
Just quick thoughts, maybe someone has tested the mentioned products, would be nice to hear!