I [M] fucked my transgender [M] roommate

So yeah I fucked my roommate after I knew that he was originally a girl, and while I was fucking him and he started saying fuck my tight pussy wtf I couldn’t process what was happening am I fucking a man with a vagina or a woman with beard or both lol no offense to the trans community but what is the point of transitioning from female to male and still getting fucked by men

Source: reddit.com/r/gonewildstories/comments/ea872i/i_m_fucked_my_transgender_m_roommate