Context: Our rogue (male) is engaged in a conversation with a male NPC (played by DM) who has been flirting heavily with the oblivious rogue.
Rogue: Well, I had better get to bed.
NPC: Do you want me to join you?
Rogue (OOC): Can I tell how gay this is?
DM: Roll a perception check.
Rogue (OOC): *rolls a 1* Dammit!
DM: As far as you can tell, this is the most heterosexual interaction you have ever had.