He likes his girls hot with a cool personality, not too cool to the point where they’re cold blooded & think they’re too good for him. He makes a reference to the seasons also, he says he wants a girl that’s May cool which is during spring, so it’s not too hot & flowers are blooming so the grass is fresh, so he’s also saying the pussy is clean so just imagine how good that sex is. Very complex wordplay, but great none the less