Без пары не живут и гагары

Everyone gets a mate in the end. See Всякая невеста для своего жениха родится (B), У каждого голубка своя орлица (У)

Cf: Every Jack has his Gill (Am., Br.). Every pot has its cover (Am.). Every rag meets its mate (Am.). For very Jack there is a Jill (Am.). No matter how black the kettle, there is always a lid to fit it (Am.). There is no goose so grey in the lake, that cannot find a gander for her make (Br.). There's a Jack for every Jill (Jane, Jean, Jenny) (Am.). There's a lid for every pot (a pot for every lid) (Am.). There's never a goose so old and gray but what a gander would wander her way (Am.). There's never a Jennie but there's a Johnny (Am.). There was never a shoe but had its mate (Am.)