A butt plug is designed to stretch the anus. The stretch will stimulate nerves at the anal opening and provide the character with the feeling of being filled up. Butt plugs are also a good way to prepare the ass for more advanced anal play. As the anus does not stretch or self-lubricate like a vagina, it is important to properly prepare the anus for any form of penetration, especially using lube. Silicon butt plugs are best used with a silicon based lube. Silicon plugs are soft and warm which makes them more comfortable to be used. Butt plugs are tapered to allow the sphincter to retract comfortably, while the character feels more pressure internally. Butt plugs also offer a double feeling of “fullness” when used in tandem with vaginal penetration. Having both the vagina and anus filled up can offer heightened arousal. Include clitoral stimulation and the character may have a very intense or overwhelming orgasm. There are vibrating butt plugs which can have multiple levels of stimulation or expandable plugs which allows the character to start small and increase the size gradually, using a hand pump themselves or their partner can control the pump, while the toy is inserted. The default should be a silicon plug unless specified otherwise. The should be heavily detailed descriptions on the sensations of the character's ass being filled, the full sensation combined with being stretched. There could be detail on the character's emotional state with indulging in ass play and using such a toy.