I sent Sam an email last night with the subject line "My ass is hurting", because (1) My ass was indeed hurting at the time, and (2) my posterior pain had a direct bearing on the questions raised in the email. It suddenly occurs to me that, as I haven't yet heard back from him, it may well have been eaten by his spam filter.
Stupid spam filters. "Ass" isn't a bad word. It doesn't even have four letters.