Clark tried to not let his mind wander back to the day when he took the vow before God and his parents. He tried to not think of that piece of paper—signed by his hand, framed and displayed on the mantle, broadcasting the sacred oath.
Clark hated going back on a promise.
But when Lex gave a final thrust into his body and stilled, his orgasm triggering Clark’s (thus obliterating the last vestiges of Clark’s virginity); the guilt over defaulting on his Purity Pledge vanished.
It was quickly replaced by an overwhelming desire to try the sex thing again.