[ucarion]

This isn't true in general. For instance, U+1F346 AUBERGINE ("the eggplant emoji") is at first glance merely a vegetable, but in practice its phallic shape means it's understood to represent a penis.

Similar things happen with other emojis -- for instance the one depicting a Peach. It's an old human tradition to make sexual puns out of our food. Since users see the pictures and not the underlying Unicode titles, users ascribe their own meaning to the images.

[CoryG89]

Wow, I didn't know about that one. Wonder if I'll get fired for spamming the eggplant in Slack later on.

[sorenjan]

Instagram blocked the eggplant emoji in in search back in 2015 [0], and there are vibrators that look like eggplants [1]. If you spam eggplants in a chat chances are the other participants will know the hidden meaning and wonder what you're trying to say.

[0] http://money.cnn.com/2015/04/29/technology/eggplant-instagra...

[1] https://emojibator.com/