why do sometimes we hear you was instead of you were and he don't instead of he doesn't
example: the new song from Fergie, fergalicious
But I ain't promiscuous
And if you was suspicious
All that s*** is fictitious
Thanks for the answer
It's a feature of many dialects of English, especially in parts of southern England. Some people see it as a sign of poor education. If you are learning English, don't use these forms yourself -- you'll get bad grades if you do. But many native speakers use these forms all the time.