Here's something you can try to tease them about when they tease you about LBT:
Anything sport or video game related.
Think about it for a second. They are teasing us about watching a movie for kids. They think that, since we are grown up, that it's wrong to be a kid in ANY way.
However, anything sport related, that being basketball, football, soccer or what not, involves playing with TOYS. Isn't that something kids play with? Balls are toys. (I'm sure I got quite a few there.) A stick is only turned into a play thing by a kid, who sees it as a toy. (Whoops! There goes hockey, baseball and a few others.) Bicycling is easily killed by the fact that kids ride bikes too. (Note that in the REAL world, tricycles count as bikes. (Why do you think they classify tricycles as bikes in a store?))
Video games are toys. It's a proven fact.
Yes, video game lovers out there, PS3, XBox 360, Wii, Nintendo DS and every freaking game console and handheld before it are TOYS. Do a bunch of freaking research if you don't believe me.
Seriously, get them with these and you'll kill their teasing easily.