No, I can't say the thought entered my head , I have masturbated watching a home made movie I was in, but obviously there were others involved ,so it's not really the same thing.
I can't imagine what it would be like not to have anal penetration during sex, I was introduced to the pleasure by a more mature partner when I was 20 years of age. I was fortunate enough to have an experienced and patient man, who was passionate about the act, he gave me so much pleasure, I adore the act of taking a cock in my bum, sometimes even more than vaginal sex, even today at my advanced years.