Back hook bras are sexier because it's easier to unhook them while kissing
I have to admit that I have very little experience with front hooks, but I tend to agree.
However... who opens a rear hook bra from the back when purposefully undressing their partner, as it is implied in the extra chapter? I find it easiest and sexiest to undo a rear hook by reaching around from the front.
I find it can be very stimulating to undress your partner from behind. Also to be undressed from behind....and more. But I'm straying from the point. Each type has its own pros and cons and just comes down to personal/partner preference.
And oops my ass! She just wanted to see Nadeshiko in that lingerie! Looked like a fun piece too!