Ok, I'll be happy to fill it, and thank you for explaining. Canon compliance is not really an issue here...I'm just trying to better understand the act as a soothing one.

Just anal play, or body touch in general? Like, penis touch as well, without intent to arouse? And just to be clear, I'm asexual. I find sensual body activities relaxing initially, and arousing thereafter. I can keep it at soothing. But is this Sherlock having a physical block to arousal? ie touch doesn't get him fully aroused (as in a medical issue)? Or would he feel arousal if he kept at it but just prefers not to because he doesn't like the more intense sensation of orgasm?