American: I'm wearing pajamas to bed. (Means he's
going to bed naked)
Brit: I'm wearing
pyjamas to bed (means he's going to bed in clothes specifically for sleeping. Probably with Chuck Norris or Superman on the front. Or
Scooby Doo. I used to love Scooby Doo back in the day. Its still pretty good but you need to find a decent excuse to watch it - like having a little brother or something.)