Why is 我草 (wǒ cǎo) vs. 我操 (wǒ cāo) funny? This cropped up on my Facebook:


  


It says:


  you vs the guy she tells you not to worry about...
  我草 我操
  wǒ cǎo wǒ cāo


I get the impression that this is rude, but anyway...

Question: Why is this funny?

Looking at some sources:


我草 (wǒ cǎo) = my grass, but YouDao indicates this might be short for 我要草你 (wǒ yào cǎo nǐ) = I want [to grass] you
我操 (wǒ cāo) = me hold (but Google Translate says this means "I fuck")


So I guess 我草 means "I want you" (in a kind of reassuring way) whereas 我操 means "I fuck" (the guy you're not meant to worry about).  I don't feel too confident with this translation.
Probably a really late comment but none of the above answers truly explained the joke. 我草 literally means 头上长草 (got grass growing on one’s head), an expression used in China to say one is betrayed by one’s partner. So, to say the joke in one sentence, one fk(我操)and one got ‘grassed’(我草), that’s fked.(wo cao)