[F4M] Newton's First Law [no gendered pronouns used] [narrative] [british accent] [free use] [primal] [rough] [spit] [penetration] [from behind] [hair pulling] [listener orgasm] [finish inside] [fingering the cum back in] [cum play] [speaker orgasm] [listener orgasm] [musings on physics] [no dialogue] [meditative] No gendered pronouns are used, listener has a penis.