Posting for a friend

Hey everyone i kno this is tmi and a wierd quistion to ask but i dont kno the answer to it my friend has just asked me if this is normal when her and her partner have intercourse she has no problems but when he ejacaculates in her after sex theres a funny smell not a vile smell just a wierd one but if he doesn't ejacaculate in her there isnt one shes just wondering if thats because of her mucus and his sperm together ir is there something ron as there isnt no smell if he doesn't ejacaculate