Bruce stammered a bit more, if anything they both had just gotten a little too into the excitement of the night but perhaps because he was older, he though he should be the one to apologize. Though now, he was remembering, he hadn't had that much to drink and neither had she. It wasn't until she repeated her apology in his head that he realized what must've happens.
"OH!" He said still looking embarrassed. "The pheromones!"