I don't have a link to the original discussion, but I can post what made it into the BRQG:
Fay: I was deeply saddened that there wasn't any more explanation of the whereabouts of The SuperBaby, though - I was firmly of the belief that Lex had to be carrying it in his ass, and should hence have developed a booty that would put J-Lo to shame. Evidently the 15' x 5' SuperPenis managed (unsurprisingly) to deposit the SuperSperm somewhere in Lex's abdomen instead.
shrift: Fifteen feet! It's the Jolly Krypton Giant! Clark must have penis space vaster by far than the katana space in Duncan MacLeod's ubiquitous duster!
Fay: I always knew Lex was brave, but my goodness, the sheer chutzpa of the man. Such masterly understatement in the face of a flesh-rendingly vast alien appendage. 'Is that a Grenade Launcher in your pocket or are you pleased to see me?'
Dana: Clark, you'll rip me apart like wrapping paper, but that's a sacrifice I'm willing to make for our love.
shrift: I'm imagining Lex clinging to Clark's cock like it's a mast in a tossing sea of lust.
Nutty: Grenade launcher, nothing. That's a Stinger missile. You can take down a helicopter with one of those, yaknow.
Although, generally speaking, one doesn't take something 5' around in hand. One might try to tuck it under one arm, but one would probably end up plopping it into a wheelbarrow or a flatbed truck.
To say nothing of what it's got to weigh.
Fay: And human teens think they have problems with getting inconvenient erections?