It airs this week!
"We were talking about it [in the writers' room] like, 'Why shouldn't [Kurt and Blaine] lose their virginity at the same time?'" he told Entertainment Weekly.
"Everybody has seen a straight couple losing their virginity, but has anyone dovetailed the gay and straight stories together and given them equal weight?
"That seemed like an exciting choice and a new thing."
The episode hits TVs in America tonight and in the UK this Thursday.
Will you be watching?