Mine:
--Get serviced at a gloryhole (there's one I know of within driving distance, but they always do their thing during my workday)
--FFM threesome. Part of that, to double-team cunnilingus on one girl with the other. Did the MFM once, and it wasn't the greatest. There were other circumstances at play, though.
--Gangbang/group sex. But to be comfortable about it, I think I'd have to be completely anonymous, like with one of those Carnivale masks, like in Eyes Wide Shut or one of those european porn productions.
--Do a home porno and post it on YouPorn or Pornhub. Again, anonymity would be key, for all involved.
Studio audience, what's on your lists?