I am a big Beatles fan. And, you know, unbeknownst to anyone, I used to be one. But I have no problems of putting titles and lines from other songs in my songs, because they're great lines and great titles. ↗
I see songs not as a commodity used up when the album goes off the charts, which is often the case with pop songs. I see them as a body of work. Life should be breathed into them. ↗