and yes, i do think law would use his devil fruit ability to separate your crotch from your body so that he can take it with him on missions. you're his personal, responsive cock sleeve and he'll fuck it, you, whenever he feels so inclined. completely disregarding -- in fact, loving -- that you may be in an unfavorable environment and would react lewdly at a moments notice.
of course, he's not a total monster, so he'll be sure to call you via transponder snail after he rubs lazy circles into your clit and watches the slick drip from your needy cunt. he'd know you're clenching your thighs, gripping at hollow parts of your body like a demented barbie doll, wherever you are.
he'd have to hear those pretty little whines you make while you beg him to go easy on you because you're "out with friends", to spare you as he so rudely taunted you during the middle of a serious meeting with the rest of the crew, or to finally fuck you instead of slipping singular digits in and out of your pussy.