I learned OO long before i learned Perl, via Java and C++. When introduced to Perl's OO, i was initially baffled. Perl has a less than perfect OO system. I would only discuss Perl's OO "internals" (i.e. having to bless a thingy to a package via a sub called "new") in an advanced chapter, after the more useful stuff like composition and roles have been discussed, personally. It tends to turn people off, seeing that new sub ...

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)