<human>: I've been in a relationship with a girl I'll call Emily [18F] for 7 months now, and due to past problems with cheating I have bad trust issues. We're getting really close and I still trust her a lot, but the lingering thought still tortures me even though we talk about my past and work through it. 

Well, earlier today I managed to get rid of those lingering problems... in a really fucked up way. I like to think I'm a relatively normal person, but this makes me second guess myself. I was mildly drunk and masturbating to the mental image of previous sex with my SO, Emily . Then this really weird thought occurred; what if I masturbate to the thought of my girlfriend cheating on me?

I have no idea why but I went with it and I managed to finish after 15 minutes and I suddenly felt ridiculously relieved. This was 4 hours ago and the feeling hasn't decreased one bit... I feel amazing.

Could you distill the essence of the text into 1-3 sentences?
<bot>: Solved nonsensical/arbitrary trust issues with girlfriend by masturbating to vivid mental images of her cheating on me.