TW how to tell new partner i was raped

without being so blunt.. my BD raped me and tore my stitches 2 weeks after i had our son vaginally. there was blood all over the sheets, it was very traumatic for me and this was 18 months ago. i haven’t had sex with anyone since. i’ve been talking to this guy for months though, and this is important for me to bring up before we ever do anything. how do i let him know and explain what i need from him because of it? idk i don’t just wanna be like haha btw i was raped now let’s change the subject.