Jerkoffinstructions – Kasey Warner – Jerking off for the good of science

Kasey is working on a research project and you volunteered to help her. You are a giver that way. She asks you to begin by taking out your penis from your pants and she begins her measurements. The first measurement is your flaccid penis, but she begins to take off her clothing in the name of science so that you will get hard. She requires measurements of your fully erect cock, so get to work! Her tiny tits definitely get you very hard and she gets her next measurement. As she slides off her skirt, you get a nice look at her dark bush and then she asks you for a sperm sample. You feel closer to cumming for sexy Kasey and you want to do your best so that her research project is successful.