Is it possible you have always been built this way, but just never noticed it?
Doing PE exercises really gets your mind focused on your penis in a way that it has never been before.
Maybe you have never scrutinized your penis and scrotum before, and what you are seeing is the way you've always been.
If you do actually have "turkey neck" I don't think anyone else would notice.
JMHO. Best of luck with the PE routine!