Aftercare is an important part of BDSM. Often times because of roleplaying (especially in a sub/dom dynamic) the sub or bottom can take on a persona. They communicate less, because that can go along with being submissive. Also new sensations can be overwhelming during sex. So I would like to remind people it is great to discuss how sex went. Especially after trying something new. I think right after the sex is useful, but people also say it should be outside the bedroom environment. So bringing it up the next day too can be a good idea. Just an idea to keep your play safe.