Is by forcing air through the breathing holes in its thorax
This is sort of like the way
That I love you.
Not bad! And if you want to get REALLY lovey-dovey on Valentine's Day, go by the Bronx Zoo's website. You can name a hissing cockroach for the one you love! (The Bronx Zoo motto: "Flowers wilt. Chocolates melt. Roaches are forever.")