Why would it be an Aspie thing? I've heard of people peeing outside before, when they are nowhere near any public toilets, like hikers for example. NTs don't do everything religiously perfect.
I remember when I was about 7 I was on a long walk in the country with my brother, a few male cousins, and my granddad. I loved it, but then suddenly I really wanted a pee. My granddad said it'd be OK to just go in the woods, but I was scared to in case the pee might have ran down one of my legs and we didn't have any tissues on us. I was rather jealous of the others because they were boys, and I was a girl. It's a lot harder for girls to pee outside or standing up anywhere.
Then when I was about 12 I remember I was at the beach with my family, and I wanted to pee but there weren't any toilets nearby. I wasn't the only girl, but when I told the others that I wanted to pee, they just said to go in the sea. I didn't feel comfortable peeing in the see in my swimsuit, even though most of my body would be under water if I went in deep enough and the water will wash it away. It still just didn't feel right to even think about it. So I just had to keep it in and wait til we were ready to go and get some chips, where there are toilets near.
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Female