I was listening to the song Amarte Duele by Natalia Lafourcade while writing this

Amarte Duele

The way the cook went on about it you would think love was the easiest thing in the world. Sanji would offer love to everyone and anyone if they were pretty enough. So could he really be blamed when he thought love would be simple.

It wasn't, love hurt.

Loving Sanji was hard and painful and not just because of the never-ending parade of abuse both verbal and physical. Loving Sanji was hard because no matter how much he loved him he had to share him. He would always share the cook with all those pretty faces and curvy bodies. He would always share the cook with his passion for All Blue and cooking.

It hurt to love Sanji but Zoro couldn't help but love him anyways.