Dr is smart.
Phinoy has more productivity then Singkie ladies. In terms of sex, I think it's better then Singkie ladies. They are more hardworking, they don't whine about inequality and feminism. Feminism has made singkie ladies unfavorable amongst their South East Asia Peers.
Last but not least. While enjoying her Phinoy lady at the every moment. Dr needs to know how to hide some important asset away from the Phinoy wife. I think that's enough if he wants to enjoy his life.