all my sister talks about men and sex and im tried of it

i love my sister and she really is my best friend, but i don’t know how to deal with this. the problem? all she does is talk about men and sex these days. i kid you not, 75% of our daily conversations are about sex and men. i’m getting sick of it. and i know i’m not imagining this because me and my other sister had a private conversation about her and she agrees that this is all she talks about. i just got out of a toxic situation myself, so excuse me if i don’t wanna talk about guys 24/7!! i just don’t know how to talk to her about this, she gets really emotional these days, and sometimes it’s just impossible to talk to her, she gets soo angry. she’s also depressed and i understand that this is something that is common with depression, but i’m also worried about her health. she’s had a bunch of pregnancy and std scares lately. i also believe that sexuality is free, and consenting adults can do what they want, but goodness i am tired of talking about it!! i don’t wanna come off as judgmental with it, so idk what to do. does anyone have any advice on how to deal with this?