Anonymous sex is a real turn-on for me. Like many, I was introduced to anonymous sex in the early 80's when adult bookstores were plentiful and many had booths with gloryholes. As a result I sucked my fair share of cocks on my knees while loops were playing in the darkened booth.
My ultimate fantasy would be for a top to take me to an adult bookstore in a run down or industrial area of town. We would enter a booth with a rather large gloryhole around noon and be ordered to strip. Then the top would have me lay face down on the stool in the booth and immobilize me by tying my hands and feet to the legs. Conveniently, the stool's height would have my ass even with the gloryhole opening. The top would re-position the stool such that my ass was filling the gloryhole with just enough room for someone in the other booth to grab my hips. At this point, I know I am going to get bred repeatedly but what I didn't know was that several ads were placed online offering my ass to all cummers with no questions asked. The ad provided information as to the time and place. Condoms would be provided to anyone that wanted one but would not be required. The real kicker in the ad was the bit about the $500 raffle at the end of the night. Each person that fucked me would be given a numbered ticket for the end of the night drawing. As the top was telling me all this, I felt the first cock of the day at the entrance to my prelubed ass.