Cocktail Tanning

What exactly is Cocktail Tanning? 
Cocktail tanning is a combination of a sunbed tanning followed immediately by a sunless spray session.

Why is this a good idea?
Sunbed tanning uses UV rays to trigger melanin production and activate the melanin already in the skin, while opening up your pores and allowing the sunless spray solution to penetrate your skin. Having the pores more opened helps them better absorb the sunless spray tan. The end result is an even darker, deeper and longer-lasting tan.