HaKatan:
Let’s not say and call it even?
Let’s say the wife wants to be sensual for her husband? Then using sensual props, even if they are used by non Jews, or even if the husband or wife knows about them via non Jewish methods, is Kadosh V’Tahor. This is by very definition, as it increases Kurva between husband & wife.
So in your example, if the wife wore the perfume to attract her husband, that is an act of Kedusha. Whether the perfume is used by Zonos or not, whether the perfume is attracting because Zonos use it or not, is irrelevant. (of course, this should not be done in public, as we agree). Now if it makes him think of someone/thing external to the marriage (such as a specific Zonah or Perutza) that is a different issue, and I would agree with you (as that is not enhancing Kurva).
Of course, ask your LOR, and YMMV. Gur need not apply.