I guess you could pre-warn them and say you need to talk about whatever the particular topic is...and ask how they feel about it, are they comfortable with it? I really would hope they would be...lord knows they should have training in all areas and be able to support you in these matters!
And I am so sorry you have to deal with processing your abuse as well...I think you MUST have a T who understands the need to talk about that in order to heal.
I see psychodynamic Ts so I assume they hear stuff like sex and health issues all the time...I have no problem just talking about sex, female issues, whatever, with my males Ts and not much filter when it comes to what I need to say.

No one has seemed particularly surprised...but my newest T (I see 2) I have not "tested"out that much yet.
Anyway, hugs to you...I hope you are able to speak freely and be heard as needed!