Don't mind me I'm just thinking about how - besides with his mom who he barely saw - Sanji was never taught that love is freely given. The people who care for him are people on the other side of a transaction to him; he pays them back in some way. He works on the Orbit, he pays back a debt on the Baratie, he is The Cook on the crew. He gives something so that he can receive care in return. When he wasn't "good enough" as a child he learned that has to be able to provide something to receive the love he always yearned for.