Safe? Yes, I think so. I was able to talk about sexual matters with my therapist, both past abusive sexual experiences and present marital and personal ones.

Comfortable? Heck no! It was always uncomfortable. It wouldn't have mattered who the therapist was, what their gender was, etc. It is just a topic I'm always a bit uncomfortable talking to another person about.

My last therapist was probably the easiest to talk to about it . . . in relative terms. He handled such conversations rather matter-of-factly, which helped normalize the discussions. Still uncomfortable, but tolerable.