condition him. make him love-crazy for you and what you do to him. build him up and break him down. make him be into the same things you are into. teach him to be the perfect toy personalized just for you.
overstimulation can always be harsher. always be rougher. slap it. punch it. force another painfully overwhelming orgasm. keep going until you lose count. until your brain feels even more numb than your d*ck. you don't deserve anything less.
sending when you feel like it and when ur "in the mood" is not what the relationship with your domme should be like.
your pleasure is not and will never be the top priority — as a sub, that thought? sending to her for her own benefit? that should be the greatest turn on of all.