hey oscy,
i can give you a partial review from clip one of that biting clip. it starts off with the women who only speak portugues beating on their slave kicking smaking his balls and some ball scraching & light pulling it isn't for 17mins in (out of 30mins) that it gets into biting mostly they switch off but there is some good double bites (one girl on Cock the other on balls) mostly its cock biting with some descent ball bites. but i think part 2 is probably a better buy as it probably has less b.s.