Add one teaspoon tea tree oil to epson salts and pour mix into bath water. Make sure to ejaculate often so the sperm that comes out stays fresh. While tampon is soaking, run a bath. As sperm dries out, it tends to smell stronger.
Should i see a doctor?
The less often he ejaculates, the stronger the sperm smell may be. You should go to the doctor if you have never had this problem before. This involves looking at behaviour, such as friction, wear and lubrication, and the relationships between them.