Sunshine seems to have forgotten that these aren't Spike's friends as well as hers, and they're instead two random people, one of which knows intimate details about Spike's life that he hasn't even shared with her. So, yes. He's tense. He definitely didn't need his cock described to two poofs.

He throws back the rest of the drink, sets it aside, then slips his arm around Sunshine's back and hefts her to her feet. "C'mon, pet. Time to go."