Again, we see a casual attitude toward sexuality: Carol wants Therese to experiment with more people. Therese has only been with Richard and Carol, and Carol wants to make sure she isn't just a phase.

Would Carol call love a "disease" if she experienced the same feelings with a man?

We present this quote with no comment. Are there answers to these questions? Are you the one who can answer them? There is no question mark at the end of that line, perhaps because Therese believes there is no answer.