7 Things you should never tell people about your relationship

3. When your partner reveals his sexual fantasy.

In season three of Friends, a whole episode is devoted to Rachel telling Phoebe about Ross’s Princess Leia fantasy — and Ross being pissed about her sharing that secret. His frustration is warranted, says sex therapist Vanessa Marin. “Most of us have fantasies that we’re not entirely comfortable with; it’s a big deal to let down your guard and share the most intimate parts of your sexuality with another person,” she says.

As his partner, Marin says you should honor that trust and keep the information private. It may be tempting to talk about if there’s a big shock value to the confession, or if you don’t know how to tell him you’re not all that keen on making it a reality. But resist and keep that info to yourself.

(After all, how would you feel if he talked about your fantasies with his buddies?) If you need to talk to someone, book a session with a sex therapist.