An odor machine, so-called olfactometer, makes it possible to smell in vr environments. First up is a 'wine tasting game' where the user smells wine in a virtual wine cellar and gets points if the guess on aromas in each wine is correct. The new technology can be printed on 3d printers.

Expensive perfumes are designed to have multiple layers of smells. Some of these layers will include notes of fruits, flowers, and spices or herbs. All of the other smells layered into the perfume combine to make a complex and interesting scent, making it feel expensive on your skin.

The sweet and nutty scent of vanillin, the main component in vanilla extract, appears to be the world's favorite scent, according to a new study published this week in current biology.

What smell turns a girl on? Aphrodisiac scents include pumpkin, lavender, vanilla, cinnamon, peppermint, and ginger. Despite some skepticism around the use of aphrodisiacs, studies show that many of these aromas do work — they can be easily incorporated into anyone's fragrance routine.

Clean and invigorating, the tangy scent of citrus, such as lemon, lime, orange, lemongrass, and red grapefruit gives men that fresh-out-of-the-shower scent, a smell that many women find appealing. Just don't overdo it, or you might smell like the produce department.

• Pumpkin - Paco Rabanne Fabulous Me
• Cinnamon - Yves Saint Laurent Opium Eau De Parfum Spray
• Champaca - J'adore Dior Eau De Parfum
• Vanilla - Guerlain Shalimar Eau De Parfum
• Lavender - Tom Ford Lavender Extreme Eau De Parfum

Aphrodisiac scents include pumpkin, lavender, vanilla, cinnamon, peppermint, and ginger. Despite some skepticism around the use of aphrodisiacs, studies show that many of these aromas do work — they can be easily incorporated into anyone's fragrance routine.

Stinkbirds have two-chamber digestive systems like cows, so they excrete a manure-like smell.

The most expensive perfume for men is the no. 1 imperial majesty by clive christian. It features fresh citrus opening scents before moving into spiced notes, finishing off with precious wood and musk.

Musk and woody families frequently feature among the fragrance notes that last the longest. Particularly if they're present in the base of a perfume. This is because the oils tend to evaporate at a slower rate than those with a fruity or floral base, meaning they're noticeable for longer.

• Citrus fruit, frankincense, lemongrass, neroli, spruce, tea tree and pine essential oils can last for 1 to 2 years
• Sandalwood, patchouli and vetiver essential oils have the ability to last for 4 to 8 years
• Most other essential oils are effective for 2 to 3 years

• Pumpkin - Paco Rabanne Fabulous Me
• Cinnamon - Yves Saint Laurent Opium Eau De Parfum Spray
• Champaca - J'adore Dior Eau De Parfum
• Vanilla - Guerlain Shalimar Eau De Parfum
• Lavender - Tom Ford Lavender Extreme Eau De Parfum