Just grab his crotch and hope you can finish things with your hand

After a while of fretting over the matter, you decide to just...go for it. You don't aren't exactly an expert in seduction, and the thought of getting a confused look when you start trying to steer the conversation in that direction is somehow more intimidating that just getting down to it.

After working yourself up for a few more moments, you reach down and get your hand firmly positioned on Eric's groin, panicking once you realize you've committed to the act. Eric seems caught off guard as well, jumping slightly at the...unexpected contact. You remain frozen as it occurs to you that you hadn't really planned any further than this...should you try to free his member, start rubbing him through his pants...take your hand off and flee in panic? That last one seems a little appealing...