Well, there's a difference between being erotic and blowing as if you're trying to extinguish the candles on your 50th birthday cake. You often forget you have a porcupine strapped to your chin which you rake repeatedly across your partner's face and thighs. When she turns her head from side to side, it's not passion, it's avoidance. Most men act like a housewife testing a melon for ripeness when they get their hand on a pair. Stroke, caress, and smooth them.
Nipples are highly sensitive.
They can't stand up to chewing. Lick and suck them gently. Flicking your tongue across them is good. Pretending they're a dogie toy isn't. Stop doing that thing where you twiddle the nipples between finger and thumb like you're trying to find a radio station in a hilly area.