As someone who had a tendency to dress in layers, it might surprise people to know that Jughead enjoyed swimming. Admittedly, it wasn't something he usually did around strangers since he was a little too aware of how pale and lanky he was.
Still, he liked Rose, so when she asked him about going swimming, he was down.
Possibly the only person not concerned about the lake being home to a monster, Jughead was just concerned about how deep the water might be. He was used to being able to touch the bottom at most swimming holes.
Jughead was able to find a pair of board shorts in his closet, which suited him just fine. He was more comfortable in longer shorts despite having decently muscled legs. The slightly baggy shorts were more forgiving than wearing cutoff jeans. Plus, they were designed for going in the water and would dry without tightening up on him. He wasn't expecting Rose to be wearing a bikini, but he wasn't complaining. Not when he was getting such a tasty view.
Tugging off his tee, Jughead had left his beanie in his room. It was far too nice out to have his head covered. Taking a moment to fold their clothes into neater piles. "Ladies first, of course," he responded with a gesture towards the water. His grin was almost wolfish as he watched Rose.