It doesn't take psychic abilities to recognize that he's nervous. Dahlia takes a moment's pause to consider exactly how she wants to phrase this, in such a way that it's quick and concise so as not to torture him, but still considerate to his feelings.

After a beat, though, she settles on something.

"So I'm sure you've noticed to some extent that I have a few ongoing romantic relationships," she begins bluntly. "I wanted to explain them. Because of the friendships I've made on the island, I've learned that it's possible and even sometimes beneficial to a person's life, to have multiple romantic partners, as long as everyone is in complete agreement that they're alright with it. A few of my partners also have other partners in addition to me, and it's all above-board and agreed to, because each time a new partnership starts, we have a conversation like... well, this one."

The last bit is pointed, as if she hopes Radar can see where she's going with this.