Where does the UK/JAR "twin only" mentality come from?

[2leftskids]

ericferret

Here's a bit of offshore twins vs singles reading http://www.ogp.org.uk/pubs/300.pdf

It's only a snap shot for 1 year but it is worldwide

Of the 47 fatalities worldwide the figures were :

57% in medium twins
21% in light twins
17% in singles (none due to engine failure ??)
4% heavy twins.