That may be true, but there are other ways to address your issues with men without him crossing that boundary. It does seem inappropriate, and he may have regretted it just as soon as it came out of his mouth which may be why he is open to you speaking to his supervisor about it. However, if he, on the other hand, thinks it is perfectly appropriate to express such things to a client, that seems like a red flag that should be considered when deciding if staying in therapy with this therapist is a good idea.

Personally, I have never had a therapist say or do anything remotely inappropriate that would have made me think I needed to speak to a supervisor about. If I did, I would have been out of there in an instant. Don't stay with a therapist that feels at all inappropriate; the stakes are too high.