Read my list of role play fantasies you have to try here. But nothing is keeping you from crawling on all fours around your apartment and barking like a dog. Bondage, autoerotic asphyxiation, needle play, and knife play are on this list. There are certain kinks you should not do solo.
Solo role play - whether it’s animal play (puppy play, kitty play, pony play) or some other form of role play - can be intensely erotic.