In a past life, you had a trying relationship, and that old, negative energy almost surely rears its head in this new relationship in this life. In a distant past, in some way, you had a relationship in which it was imperative for your lover to speak out, but you silenced them and even penalized them for their opinions. This may have been a religious persecution or a political one, or something more personal, but the dynamic left its mark, and it comes up again between you now in this life.
Your lover starts to feel nervous about expressing their true, full opinions. They might feel like you interrupt them too much or even out-and-out make fun of their ideas as being ridiculous or worthless. If they already have problems with low self-esteem and insecurity, this relationship could really do a number on them. If they don't, this bond might not last long, unless there are a lot of other more harmonious aspects between you to bring you two more in line. They don't want to put up with you putting them down. They're a smart person, and their opinions and perspectives matter. Even when they are wrong about something, you shouldn't make fun of them or otherwise mistreat them. Remind yourself of this, whenever you have the feeling that they're being silly or even stupid. They deserve your respect, and their own.