It�s not illegal, though your mum would disapprove and his wife is a dog so she might be a bit upset. Also, the man at work who says rude things and talks about oral sex a lot might think it strange that you have gone off him and started to see your cousin, but only because it is out of spite due to the man who you really wanted to declare undying love to is acting uninterested.
You are confused, so I can see why you would ask this question. Next you�ll be wondering about STD�s, abortions and the youth of today, blah blah blah