Green’s Dictionary of Slang

love lane n.

the vagina.

1896
19001910192019301940195019601970
1980
[UK]Farmer Vocabula Amatoria (1966) 234: Retour de matines. To copulate; ‘to have an ejectment in Love Lane’.
[US]Maledicta IV:2 (Winter) 183: Examples here include [...] Love Lane.

In phrases

take a turn in Love Lane on Mount Pleasant (v.)

to have sexual intercourse.

1890
189018911892189318941895
1896
[UK]Farmer & Henley Sl. and Its Analogues.
[UK]Farmer Vocabula Amatoria (1966) 41: Bonheur, m. The act of kind; ‘a turn on Mount Pleasant’.