Just because this slave is blindfolded doesn't mean Lyla expects his service to be any less impeccable. She tends to keep him blindfolded in the garage so that he learns that his focus in life should always be her and only her, so when she tasks him to lick her boots before she goes out she expects him to fumble his way over to her and lick like a good groveling slave. Whether he can see or not is irrelevant, her boots need cleaning so he must now serve. She eventually takes his blindfold off to reward him with her visual splendor while he worships, then he is put back in the garage until she is in need of him again.