How to Do It What a turn-off. Photo illustration by Slate. Photos by Getty Images Plus. How to Do It is Slate’s sex advice column.  Have a question?  Send it to Stoya and Rich here.  It’s anonymous! Dear How to Do It, I’m a man, and I started dating someone new about two months ago. We’ve been taking it slow. We’ve hooked up a few times, and I really like her. But what she did recently during the second time she’s ever even slept over really threw me off. When she came over, she decided to “surprise” me with elaborate lingerie and a lot of makeup/glitter. We had sex, and it was good, but the whole time it felt like she was putting on a performance of sexiness and what she thought I would want rather than being actually sexy. All that extra stuff wasn’t really a turn-on and just confused me! I’m not sure if I should say anything to her. I don’t really want to say “Hey, that was kind of weird, and you don’t need to do that” because I know it won’t go over well.…