"task" or "pastime"?

Hello,

1/ I wonder if it is "a task" or " a pastime" in the verse in the song What Is A Youth from the movie Romeo and Juliet (1968). Some said that it's "a task", and others, "a pastime". That confuses me a lot. Please help!

2/ Could you explain what it means "Caper the cape" in the verse, please! I looked in my dictionary, but I couldn't find it.

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(source: video:

Caper the cape (???), but sing me the song
Death will come soon to hush us along
Sweeter than honey and bitter as gall
Love is a task/ a pastime (???) and it never will pall
Sweeter than honey and bitter as gall
Cupid, he rules us all.

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THANK YOU very much for your help!

and HAPPY NEW YEAR 2018!