I despise those assholes who try to deny their 'intended puns' even when they're obviously intended. And by pointing them out it also implies that the reader is too dumb to pick up on the pun, which is insulting.
But actually I didn't mean for that to be a pun... I really didn't think about it. So I can honestly say 'no pun intended.'
Never whistle while you're pissing.