not the only pebble on the beach
not the only fish in the sea

But he is not the only pebble on the beach.

You're Not the Only Pebble on the Beach" - Berliner, 1897 "

After a few years she expanded into bawdy comical songs, such as "You're Not the Only Pebble on the Beach" (1896).

Anyway, we had us a nice talk and I was right sorry to finish the coffee and those little cakes, but it did look like we were going to part friendly when all of a sudden she says, "You aren't the only pebble on the beach."

Well, guess what, you're not the only fish in the sea.

She leaned closer towards him, and half closed her eyes, and decided that really, if she tried hard enough, she might just be able to convince herself that Piers Morrison wasn't the only fish in the sea.

BUT, AS YOU KNOW, WE’RE NOT THE ONLY FISH IN THE SEA.

What Marlborough really meant, as Kingsley well knew, was that Leicester had got in first on one or two matters recently and Marlborough wanted the opportunity to show him that he, Leicester, wasn't the only fish in the sea.

The contention that Africa's colonial subjugation was "as much the achievement of the mission school, the telegraph office and the laboratory as of the Maxim gun" chimes with 19th-century propagandists of empire, but they are not the only fish in the sea.

Your uncle," resumed Drayton, pulling on an old pair of slippers, "gave me a disquisition on the sheltered life your sister has led and requested that I eschew her company for two months so that she can learn that I am not the only fish in the sea.