Random bathroom encounters

I walked in to the (women's) bathroom this afternoon and heard someone talking in the last stall.

"Who is it?" the person in the stall asked. And before I could answer, she asked further, "Is it a man or woman."

"It is a woman," I said, thinking I just referred to myself as an 'it'.

The person then continued to talk to herself. While I was washing my hands, she exited the last stall.

"Are you a student here?" she asked.

No, I explained, I worked at FOCUS, a non-profit in the building. She seemed satisfied, no more questions, and I left. Random.