Most of Loki's long-term acquaintances regard him with wholly justified suspicion, which unfortunately precludes simple verbal expressions of kindness. He is a villain, in his own mind, however much he may protest it when someone else takes him to task. Something a little soft, a little gentle, is a better way to disarm him than any weaponry.

So, maybe the bar is low for them both. No shame in that, as long as they keep it to themselves.

His lips are cool, but smooth and silky as the rest of his skin, and he responds to the kiss with finesse. He lets Finnick lead the kiss, lips half-parted in invitation, and the hand that just stroked his cheek slips down to rest on the back of his shoulder. Eyes closed, he's conscious of warmth and the scent of the ocean.

...Oh, yes, he could to like this man quite a bit.