No, only a "while" pun. Makes sense after you've seen the entire "while" comment thread:

. This is one of the best shower thoughts I've seen in a long while.

. This certainly is a shower thought I’ve seen in a short while

. This is one of the shower thoughts I've seen in a long while.

. This is one of the worst shower thoughts I’ve seen in a long while.

. This is not one of the shower thoughts I've seen in a long while.

As for the showerthought (now removed), it essentially has been said before:

"Eating less reduces your waist, your waste, and your waste."