What did Romeo tell Juliet about the Stone Walls?

Juliet asks Romeo how he climbed the high stone walls,

"How cam'st thou hither, tell me, and wherefore?

The orchard walls are high and hard to climb..."

Romeo replies that he used "loves wing". He claims that any barrier is possible to clear with "loves wings".

"With love's light wings did I o'erperch these walls;

For stony limits cannot hold love out..."