Depending on how you define 'common' in this case. Certainly, going at it like rabbits is the common thing here. Sensible? Maybe to everyone doing it.

Unfortunately, Umi has only ever heard whispers, and read a few snippets of some naughty writing, so her knowledge is about as clinical as Reika's, just less informed. "I could... um..." Lean in, close enough that they can feel each other's breath. "Can we kiss?"