I think Perry is a safe choice IF Lena wants to dive into whole exhibitionism stuff with Ian(as we see scene from park) bcz he is too timid to do anything(Like we see with Emma) and also if he is going for Emma/Cherry. But it may not be as much exciting as the park due to whole fear of getting caught as such.
Or something like this.
*Perry helping out at the Cafe.
p: O-oh, s-s-s-sorry L-Lena. I d-d-d-didn't know you were i-in here.
l: Hey, it's fine. Why don't you come in?
p: B-b-b-b-but... you are ch-ch-changing.
l: Why don't you help me out with this zipper?
p: O-o-o-o-o-o-ok
l: Is that a boner?
p: S-s-s-s-sorry L-L-Lena. W-w-we shouldn't be d-d-doing this.
l: It's alright. It's just looking right?
p: N-n-n-no. This isn't r-r-right. I need to tell I-Ian.
l: Shhhh... It can be our little secret. Let me help you out.
p: O-o-o-o-o-o-ok... A-a-ah... ooooouguughhh... C-c-c-c-c-c-c-coming...