Try this app, it disables your touchscreen so that won't happen. I would recommend setting it to reactivate the touchscreen by pressing the volume button.
Check out touch lock (unless you get off on the cum-touch roulette, in which case, no judgement!). Can't tell if you have iPad or Android, so here's both:
Android: Touch Lock
iOS: Guided Access-Touch
You're my first tribute, Natalie! This picture is amazing, so much so that I started to lose control of my phone camera when I began to spurt and decorate your delicious curves with cum. Here's a mid-session pic: http://imgur.com/NOQR7HB
...and the grand finale: https://vimeo.com/95096694
Thank you for reading the new rules! As a prize for being the first to properly tag your tribute, would you like some extra emoji user flair? I could give you a 🦊 if you'd like.
BTW, it looks like you have an Android tablet, so you can lock the screen with an app like Touch Lock
Install the app Touch Protector and make three changes: 1. Lock Design -> Preset lock design -> No frame 2. While Locked -> Full screen -> Enable it 3. Safety -> 5 times touces action -> Do nothing
Voilà, crazy effect is gone :) Demo