As he opened her door, he noticed a tear rolling down her cheek.  It was all so overwhelming, the happiness to be exact.  As he wiped the tear away with his thumb, she leaned her head into his hand. Running his hands through her hair, never breaking eye contact,  hundreds of thousands of years of instinct took over.  When their lips met the world that they lived in disappeared and they were immediately transported into a new existence.  Where there was two, there was now only one.  They were lost in each other, not knowing where one person started and the other ended.  

It could be argued that no first kiss has ever been as deep or sensual as the second kiss. Their experience was no different.  Easily the second kiss in the car was the kiss they would be thinking about every second that they were apart.