bathblast
When you are having rough anal sex in a bath. The male partner then has to jizz in a bottle of soap and pour it down his partners vagina. You then have to commence in sexual intercourse, cleaning your dick and making your partner cum out all your clean and purified cum. This concoction must then be solidified and then turned into a bar of soap to use as a dildo.
"Wow me and Jessica had a hell of a bathblast last night"