7. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Ibrahim ibn abu Mahmud who has said the following: “I once asked al-Rida عليه السلام, ‘Is it permissible for one after experiencing sexual relation to come in contact with perfume, oils or such things as chewing-gum or freshener, then take Ghusl (bath)? What happens if such one afterwards finds pieces left on one’s body or marks of rubbing oil or perfumes and so on?’ He (the Imam) said, ‘It is not harmful.’”