Where is the resemblance?

Scenario 1

I was walking past CKC's office. CKC is T's master.

CKC: Eh, is that Derrick who just passed by?
Someone: Yar...
CKC: Eh, he looks like Thong huh?!

Scenario 2

The firm's nicest tea lady, Kak Selvi was talking to me...

Selvi: You're a very nice person. There's another guy on 8th floor who is also as nice as you.
Me: Oh?? (trying to figure out who that person is)
Selvi: Ya.. I can't remember his name but he looks very much like you la~
Me: Thong, is it?
Selvi: Ya ya... are you two cousins ar? Or are you two related?
Me: Err... No, no...

Scenario 3

I was with my personal trainer, Pooma in the gym. I was doing lunges when T walked towards me (in formal clothing) to ask me something. The conversation finished briefly and I return to the exercise.

Pooma: Eh, that guy who was talking to you, is your brother ar?
Me: Huh? No... he is my friend & colleague.
Pooma: Oh... I thought he is your brother. You two look alike la~
Me: ..........