Your neighbour comes round to ask for help with her "test", it's on the male anatomy and thought you may be able to help by showing her your penis. You take it out and she is amazed, it grows more erect and she encourages you to masturbate in front of her. She massages your testicles as you jerk off. She strips off and gets on her knees in front of you, she wanks your erect penis and starts to squeeze your testicles, you blow a big load of semen all over her tits! *using testicles, erect, penis*