YOU SAID:
i took my horse for a ride
INTO JAPANESE
私は自分の馬を乗せた
BACK INTO ENGLISH
i rode my horse
INTO JAPANESE
私は馬に乗りました
BACK INTO ENGLISH
i rode a horse
INTO JAPANESE
私は馬に乗りました
BACK INTO ENGLISH
i rode a horse
That didn't even make that much sense in English.