I have a boy friend that has a yahoo ID in the name of a girl and chats with boys. What is this?

Why he chats with boys in the disguise / as a girl. It seems that he chats like a girl more that he chats like boy. Why he does like that? What can be his ual orientation? What he is trying to achieve. He has 2 profiles in Hi5 (asheq707@yahoo.com , boy and asha_lll@yahoo.com, girl). What is the motive behind this? It is not an isolated event he does it always.