great question, for me it came across when i was dating a younger guy. we where in the moment me on top and he couldn't help himself and he peed. first i was taken back but his embarrassment just made me push it i told him he need to be diaper like a baby. mind you all this was way before the net. the thought got me so hard. the next weekend he came over as soon as he got in my apartment i had him down and was diapering him. he giggle like a little girl my love of sissy bois was born.