I don’t believe for one moment that Arnau didn’t walk into that spa with the intent of doing exactly what he did. It could be said here that Arnau’s silence was consent. Having said that, Tian may have crossed that line, but Arnau, by his own admission, did nothing to communicate what he wanted. But just having touched it while the masseur is doing his job is no reason for any guy to be upset. Lingering there is the fine line that may be crossed, and if the client doesn’t want any more contact with his penis than would come from the masseur doing his job while working on the inner thigh and pelvis, he can indicate that. Even in a non-sexual massage there may be contact with the penis. There are muscles all the way up the inner thigh that for a complete and non-sexual massage should be massaged.
There are muscles in the glutes (the ass) that absolutely should be massaged.