- Why can't you explain now?
- Because so many things are so important.

5 seconds sound clip from the The Little Shop of Horrors (1960) movie soundboard.

You can hear this line at 00:58:41.950 in the Blu-ray version of the movie.

Quote context

[...]

- I need some chow. Ooh, my empty stomach.

- Audrey, please wait. Listen to me.

- I've listened to all the nonsense I wanna hear, Seymour. You're a nut.

- You tell me that you love me and then you you act like a complete idiot.

- Please listen, Audrey. I'll be able to explain everything soon.

- Why can't you explain now?

- Because so many things are so important.

- I wanna marry you. But I gotta take care of mom.

- Well, that plant in there is gonna make it all come true.

- Tomorrow they're gonna give me a trophy and I'll be famous. I'll be a big botanist.

- And then we can go to the South Seas just like we planned and all.

[...]