So im 14 and havent had my period but i like to use electric toothbrushes and back massagers they feel so good, but do you think that I can put stuff on the inside like a sharpie or something(cleaned) even though I dont have my period, and how would I do it?
Yes that would be quite alright! Girls don't Masturbate when they're on there period Because they don't like the blood. But I assure you reaching orgasm while on your Period Is very much possible!
Issue to try penetration I would suggest doing small like a sharpie start slow while rubbing your clitt then go faster and faster if you feel yourself getting looser you can add more sharpies or pens :)
hope I helped!