beast_lover is a hidden stat, you aren't supposed to see it without save/game editors. The best way to know if beast_lover is high enough is to check whether the pet tricks are fully unlocked. Attacking beast enemies will lower beast_lover, while lewding them in battle will increase it. Pet affection doesn't go any higher than 50.
Remove your pants and enter Bareshade over and over until you have enough lewd fame. Or do lewd things with the drunkard.