Set your phone so you will receive an instant notification whenever a new message arrives.
Put any emails you are interested in people sending you triggers to also in it (and set your phone to notify you whenever a new email arrives).
Fix your KT signature. Put into it your KiK, Skype, Telegram, and any other social network you use for sex in it.
That way, anybody will be able to make you orgasm at anytime. The trigger will work in person too, so if you just tell whoever fucks you... You will have no more cumless fucking sessions... Unless (of course), whoever is fucking you does not wants you to cum!