Gee, you mail
one plastic anime vagina as a Christmas present, and people start thinking you always do that...
It could totally be a dildo this time, y'know? :3 Or an open-chest turtleneck winter sweater clothing which seems to be a huge hype on Pixiv / JP twitter.
That would have been a great idea! (Irrespective of partner gender.

) But by the time this meme exploded it was too late to do do it.
But I won't be surprised to see it on a lot of cosplayers this next Comiket.
I think the post office employees are already starting to expect something weird every time I show up there. The other day I mailed a whole luggage case and it was like "Let me check your form: clothes, books, plastic figures, a (Washizu) mahjong set and... a knife?".