Neat trick but I'm afraid I lack the penis for the job. No worries though, that's where the GHB comes into play. It's all about equal opportunity fellas.
"You don't deserve my cock... you don't even deserve a bulldog's cock. All you deserve is your own stinking shit, so get down and suck it off my prick" .... turn the volume up for this one boys. Waaay up.
Moral of the story: always be able to identify the person sucking your cock, unless you're totally cool with putting your sexuality in harms way. Some risks just aren't worth taking.