Yes

"We need to consult with a few other people on the study for a minute, can you hang out here for a few minutes?" Jenny asks Mark.

"Ok" he responds.

"Dont get dressed yet, we might still need to do a little bit more testing." Jenny tells him, as her and Kendra leave the exam room.

A few minutes later, Jenny walks backs in holding a clipboard.

"Hey, so it turns out we'd like to keep this study going with you. We would need you to refrain from masturbating yourself, but every so often either myself or maybe one of the other labgirls here will be stimulating to ejaculation. Are you are interested?" She asks.