Just before you climax, say something funny. If done correctly and timed perfectly, the girl will laugh as you ejaculate. Because she is laughing, the semen willsquirt out her nose.
"Tina really found that joke funny, and I should know. When I said it, I turned a regular blowjob in a Chuckling Blowjob."
To put ones balls/testicles in ones mouth and chuckling with laughter, gobbling them up then gagging while giggling
guy starts getting head
"balls in mouth"
guy getting head has a thought
guy getting head: "Today at the bank, an old lady asked me to help check her balance. So I pushed her over."
guy getting head starts chuckling while having his balls in his own mouth