Over 6 years and two countries:
I've had someone "hire" me for a "friend" (etc) maybe 4-5 times. Also had someone who came to see me first send a "friend" my way, maybe abother 5-6 times.
Not had a parent, but a guy who just turned 18 turn up to see me. He looked so young I made him show me his ID before I would continue with the session.
Had a few disabled gents inquire about a session, but I was never able to provide them one bc my in-call was not disabled friendly.
Had couples session, where the guy initiated it, maybe 8-10 times. Do doubles count? Provided many 4 hand massages with a few different ladies.
Never had the pleasure of offering my massage skills to a single lady on her own (alas, I can fantasize!).
Do fetishes count? I could probably fill a small book with the different fetishes I have catered to, here and there.
And if you want to talk about non-standard, does it count if the gent is so attractive you have to hold yourself back from jumping him? Lols. It has happened on occasion.