They were being so lovey-dovey in the park that it made passersby feel awkward.

lovey-dovey 是一个复合形容词，由 lovey（亲爱的人）和 dovey（像鸽子般温顺的）两个词组成，常以重复押韵的形式出现。这个词用来形容"过分亲昵、腻腻歪歪"的恋爱行为，带有轻微调侃意味。