BB session cancelled b/c tight balls

I found myself near a brothel yesterday, so thought I’d treat myself to a BB session.

But… my balls were SO tight. My balls were almost invisible outside my body and my scrotum skin was hard. There never usually like that with me. I’m sure it was nerves.
But they definitely weren’t squeezable, so I bottled it.

Has anyone else ever had this before a session? Any tips to get them loose on command?