There is a specific word meaning 'without my asking' and I cannot seem to recall it whatsoever. Used in a sentence: "she told me all about her personal life 'without my asking."
spontaneous: Happening or arising without apparent external cause; self-generated; coming or resulting from a natural impulse or tendency; without effort or premeditation.
unsolicited: Not looked for or requested; unsought.
unprompted: proceeding from natural feeling or impulse without external stimulus.
unasked: not asked for; unrequested: not asked for.
Another alternative would be unbidden.
unsolicited : given or supplied without being requested or asked for
This is exactly the word you're looking for.
This adjective is used fairly often with nouns like advice and information.
on one's own initiative/account: without prompting or directions from others; on one's own
on one's own hook: US if you do something on your own hook, you do it without anyone else telling you or asking you to do it
off one's own bat: if you do something off your own bat, you do it without anyone else telling you or asking you to do it
flat out: in a direct manner; bluntly: told me the truth flat out
blunt: abrupt and often disconcertingly frank in speech
abrupt: sudden; unexpected
out of the blue: suddenly and unexpectedly
What do you think about deliberately ?
Voluntarily could be useful in some contexts.
You may be looking for the words "slamming" and/or "cramming." This is when, typically with phone subscriptions, the provider adds on services or charges that you have not agreed to.
Consider proffer, where the context is one of bargaining:
Also; as in business, a proffer can be a sign of "good faith" a first offer or proposal, to show a willingness to "barter": [see good faith barganing], [barter].
I've heard "gratuitous" used in this sense.
"The conversation detailing her personal life was both gratuitous and in poor taste."