Help me figure that out

http://www.xvideos.com/video1192441/boy_s_raw_urges_#_tabComments

I was lurking there.I stumbled across this video. So guys help me figure what they talk about

It's about at 0:35-0:55

B- did you know that a guy's ass… (whisper whisper)

T- figured that.

Then they laugh about something

B- will you… (whisper whisper)

T- okay sure.

I wanna know what are they talking about.