First of all, I'm SLOWLY making my way through rewatching the series, and I finally got to this episode!
I remember when I first saw this episode on t.v., I thought, "whoa, harry's a pimp!"
But now as I watch it as an older, young man, I think, "Wow, Harry is such a bitch." Tal was def wearing the pants...
So as for Tal possibly having a Varro equivalent of an oscar-mayer, I might believe it, but I highly doubt it. With the white flashes I would think there would be some kinda chemical secretion/fluid swapping of sorts as opposed to the typical penetrate-and-deposit... but whatever.
Also, the best bit of dialogue is from this episode!
Paris: I GIVE UP!
Chakotay: After only two minutes? (To Tuvok) How do you do it?!
Tuvok: Simple; I lwait until his own illogic overwhelms him.