"It's been a while since I have shown off my armpits to you, and it's been a while since you have jerked off to them... so, what are you waiting for?  I run my fingers across my armpits while I talk about them, sniff them, and encourage you to jerk off to them. At the end, I will give you a cum countdown, and tell you to imagine cumming all over my armpits.  Includes some close up views."