What the ...?!!

"He said it would be right here!" exclaimed Bob. "But it's not here!"
"Are you sure this is the right place?" Amy asked.
"Positive! He said to come to four-oh-four-dot-html ..." Bob blushed. "Oh."
Amy snickered.
"He did it to me again! That son of a ..."
"Gee, Bob, you'd think you woulda learned after the last time!"
"Oh shut up. I'm going home."