Half hard is fine, but no more than that. At least, not at first.

"You might like root beer though. It's a soft drink that's served cold and it's not quite vanilla or minty, but it's sweet." Once he's satisfied with the amount of lube, Bashir holds up a slender, metal rod with a gentle curve. "I think metal is best because it tends to work more smoothly than silicone. What ought to happen is that either you or I can begin the process and the weight of the sound ought to just help it slide into place."

"If you've discomfort, more lube. If you've real discomfort, stop and I will carefully remove it."