The smell of heather is rather pungent, extremely similar to human semen.

The reason why it smells like semen is because its flowers contain trimethylamine and methyleneethylamine, two chemical components that smell similar to sperm. The smell of heather is generally harmless to humans.

Related information:

Heather, also known as Millennium Red, Fangu Wood, etc. Heather is an evergreen shrub or small tree in the Rosaceae family and is native to China. The flowering period is from April to May and the fruiting period is from October. It has a round crown, dense leaves, red young leaves, white and dense flowers, and bright red fruits in winter. It is a common cultivated tree species.

The wood is dense and can be used to make wheels and utensil handles; the leaves and roots are used medicinally as tonics, diuretics, and have sedative and antipyretic effects; they can also be used as soil pesticides to control aphids and potato pathogens. Spore germination has an inhibitory effect; the seeds are pressed for oil to make paint, soap or lubricating oil; it can be used as a rootstock for loquats. Loquats grafted with heather have a long life, are resistant to poor soil, and grow strongly.