It may be against uni policy.
If your not sure what to say the best thing is to focus on what your doing when your talking normally. You have to be a little over the top really. Touching your neck sensuously, taking your fingers through your hair and upwards, jutting out your breasts, glide a necklace/ fingertip across your lips as you listen to him.
You should compliment him, on anything at all, as inappropriately as you can. Say something about his voice and he would have to be a fool not to know you're into him, which is what your after.
Your argument for not being wierd failed really, you just proved instead you're an *******. Leave her alone.
Seriously, it won't happen. Girls always swoon over their lecturers. I'm sure he can do better than some random horny student haha.