"Pain" Vs Sensation

How do we express pleasure at something that we have been conditioned to know as "pain"?

Let me first be clear. i do not identify as a masochist though, i probably am one by dictionary definition. it seems to be that a masochist is aware that the sensation they are experiencing is "pain" as opposed to "pleasure". i find that for myself, except in extreme cases, i feel these two sensations as the same. though on a sliding scale of intensity. "pleasure" being the less intense end and "pain" being at the more intense end. for myself, i think of actual "pain" as the point where the pleasure becomes too intense for me to cope with physically or mentally... or when something is uncomfortable or inconvenient. for example; when i stub my toe, its an annoyance and i say ow - however it does provoke a response in my body that would normally occur when experiencing pleasure.

the only thing i have experienced that does not fit this scale on any level are migraines. I have them chronicly and am on both preventative medication and analgesic medications for them. i find though that the intensity of these bouts are lessened when i have regular play dates.

as to my question above, i find that as the intensity of the sensation i am experiencing increases i am more likely to use conventional ways of emoting what i am feeling. i go from being quiet to moaning or whimpering to saying ow, stop and no. this is something that confuses me because when i say them, i do not mean those things in the slightest, it just seems my brain has no other way to react. its a practice i would like to stop. i feel this confusion of expression creates a confusion in general during a scene which i find distracting. there can be some fun in saying these words and play acting, however i would prefer that to be a conscious choice rather than a default dialog. perhaps i should start trying to say "bananas" instead of "ow", except that it could be perhaps confused for a safe word.

i do not at this point have an answer for this quandary though i hope to revisit it in future. i would be interested in hearing other people's thoughts and views on the topic.