Private Public Orgasm

I've always been turned on by the idea of having to be quiet, having to show restraint, by getting down somewhere in public. Specifically, I think it would be really hot to be fingered in a library, at the movies, or on a longer train ride... I think how it would be sexy to hide away, this little private secret, him almost trying to get me to the point of screaming, playing with me, but I have to hold back, orgasm in silence, have my reaction contained, and in that way very much MORE physical, shaking, like my orgasm is forced to be displayed more and in a bigger way through other means...