Well, all I can tell you is get used to it :)

I think cats lick for 2 reasons:
1. Cleaning you
2. reassurance/closeness

Cats are always cleaning themselves, so perhaps your soap smell is not up to
your boys scratch :) Tigger is forever cleaning me too, but never right
after the bath, so i fugured I smell OK for a while after he he.  On the
other hand he could be avoiding me after bath, cos I don;t smell familiar,
and he likes to cuddle up to me and lick my hands and his own tail, just
before his bedtime, or right after he woke up, so it could be this
closness/security  thing. Something like many humans having a security
blanket or a cuddly toy.

I also read somewhere cats like to lick off the salt in humans sweat. No
idea if that is true
Gee.