Boyfriend said "Where them hoes at"?

My boyfriend plays a lot of videogames with his guy friends. Well, today I went into the room and he was chatting with his friends about something and he said, "Where them hoes at?" He then turned around and was startled to see me. He then told me what he said to his friends. I got upset and he said he was just joking and that I need to loosen up. Am I in the wrong here? He said his friends talk like too and that one of them even goes to strip clubs with his wife and another one talks about woman's breasts in front of his wife.

Boyfriend said "Where them hoes at"?
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