Is it normal for guys to flirt with other women even in relationships?

Philippines
@laydee (12833)
July 15, 2009 11:05pm CST
Is it normal for guys to flirt with other women even though they're in a relationship with someone else? I was torn to learn about my boyfriend flirting with other women. I am truly disturbed at this and am really hurt. I confronted him about it and it seems he feels it's something I shouldn't worry about. I'm totally confused.