When you take a shit in between a womens breast and "tity fuck" her so this resembles a chilli hot dog. Homosexuals also practice this by shiting in between his ass cheeks or he may shit himself and your put your penis in between his "Buns".
When you are tit fucking a girl and you take a dump on her chest to provide lubricant. The resulting penis covered in excrement between her tits resembles a disgustingchili dog.