[he's definitely no expert, but while he washes, he rubs the sole of Sanji's foot with his thumbs, so yeah. Massage. Then over the top of his foot and up as far as his calf, giving the muscle a good, appreciative squeeze. Zoro doesn't draw it out too much though, finishing up with one and moving to the other, and honestly doing his best not to tickle.]
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[he's definitely no expert, but while he washes, he rubs the sole of Sanji's foot with his thumbs, so yeah. Massage. Then over the top of his foot and up as far as his calf, giving the muscle a good, appreciative squeeze. Zoro doesn't draw it out too much though, finishing up with one and moving to the other, and honestly doing his best not to tickle.]
Gotta keep the Black Leg in shape, you know.