I've seen the complete clip. If you could see the silly snickering filmed report that preceded this exchange, the comment about "penis" would have seemed a good deal less inappropriate.
(The "G Shot", btw is a collagen injection administered internally to position the G spot for more direct contact during sex.)
I'm guessing Michael is angry that he went to college to be a journalist and now all he does is report fires, murders and interest pieces on sex drugs.
if they know where to inject fluid, then that means it exists and that means that trying to convince your girlfriend its a myth isnt going to work now.