[citation needed] Yamada subsequently coined the related term parasite couple to refer to married children living with the parents of one partner.
[citation needed] One possible side-effect of the parasite single phenomenon is the increase of the average age of the first marriage (though this is also attributable to other factors, such as career prospects and education).
[2] In Italy, parasite singles were offensively called bamboccioni ("grown-up big spoiled babies") in 2007 by former minister Tommaso Padoa-Schioppa, voluntarily ignoring the situation of a considerable part of the 20- to 30-year-old population.
[3] In post-communist Central Europe, the phenomenon is more accepted, possibly due to socio-economic reasons and soaring housing prices.
The reasons for leaving home before achieving financial independence vary, but mostly it is due to college or to start a career with small or uncertain initial incomes, such as in arts and sports.