Porta-potty off the Interstate

I was driving from San Francisco back home to Los Angeles on the 5 and I was feeling so horny. I stopped at a rest area to take a piss (really!). Because the regular bricks-and-mortar restrooms were closed (construction? remodel?) they had set up some porta-potties for people to use. Well, I went to relieve myself and this surge of horniness just came over me, so I thought to myself 'This would be a great place to wank off!' So I did. I know people could hear me and they knew what I was doing (it was obvious). One college guy said to his buddies 'I can't believe there's a dude jackin' off in there!' Really fun.