This exploit relates to the new "Love is in the Air" Event this year's Valentine Day.
You need the "Sign of Love" to talk perfumed to a NPCs with a heart
above his head to get a present.

The Exploit:

You need 2 NPCs standing close to each other e.g. the SW guards.
They have to be in right-click range that the window will open if you talk to them.

The action:

You click (with right-click) on the FIRST NPC and right after that on the second NPC.
That will cause the SECOND NPC to loose his heart above his head, but the first will still have it, a thing that shouldn't be.

You can repeat this exploit as often as you want to