Ahem, we did a test for science a while back. It was simply for science. Seriously. We were curious.
Anyway, Lip Venom applied directly to a nipple makes it swell up and tingle, but not painfully. The control-- ie the nipple without lip venom-- is, obviously, unaffected.
That sounds hot. Heh.
And you and your roommate look gorgeous.
I’ve used the lip plumper glosses as well. It’s an odd feeling, but nothing unpleasant. They do make my lips swell ever-so-slightly.
I wonder what would happen if a girl had that on her lips before she gave someone a blowjob? (Purely scientific curiosity, you understand.)
It wasn’t hot at all, we were driving down the road doing science. Maybe if I were attracted to girls (particularly ones with capsium laced nipples), but sadly, I am not! 
And thank you!
Interesting fact: boys generally scream and flail not unlike Sims when you just kiss them with that gloss on. If you were to go near their precious with capsium lip gloss. . . you’d probably get kicked right in your lips. Of course, your lips would be so plump and lovely that they’d just absorb the kick, so who knows.
Jeez, I was gonna suggest that the idea behind the swelling and wrinke… er, abatement, would be about improving the airtightness of the seal when lips encircle… er, boys’ “presciouses”. Really, imagine how much harder one would have to suck with wrinkly, and hence leaky, lips. 
Somewhat off-topic, Diosa, but does your roommate happen to like lecherous married creeps she knows, albeit very tangentially, from the Internet?
Loves them. It’s like, the biggest shining light in her day. 