A Brazilian guy I know went to school in the USA and not long after he arrived he was talking to this American girl. They had a conversation.

Girl So what do you miss from back home in Brazil?

Guy Oh! That's easy. I really miss the beaches.

At this point the girl is staring at him in a really hostile way and he's confused wondering what he can have said to have upset her. She is totally offended and it's obvious that he has committed a major violation.

It turns out that the way he pronounced beaches (influenced by the Portuguese) it sounded just like bitches.
Ouch!