Just a moment ago, he was prepared for her to be hostile toward him. But then he went and let his guard down and now he's... Well, he's startled, for sure, but she's not hurting him, so he won't try to shove her away.

"I do not know the extent of its effects. I have seen many others suddenly engaging in - " Oh, this is hard to get out. " - several... physical... activities. I have not reacted in any such way myself, but it did not seem coincidence that others reacted at the same time the flowers appeared."

Give him a moment more and he'll lift a hand to try and geeeently distance the two of them. Personal space plzkthx.