Those last to two questions aren't very good answers.
People will bite their lips for different reasons, and most people think it's to be flirty but that's actually rare when it happens. That's just speculation. I have done research on people biting their lips and why (for a science class) and I asked 50 people why they bite their lips. And only 2 said it's to make boys like them. I asked 25 girls and 25 boys of why they bite their lips. Here are the answers I got.
I'll start with the girls:
1) I bite my lip when I'm nervous of something.
2) I usually bite my lip when I'm scared of something.
3) Whenever I bite my lip it's because I'm anxious or nervous about something. Like tests.
4) I bite my lip to be a little flirty, but usually I do it when I'm nervous. I do it without thinking, it's a reaction I get with certain things.
5)Whenever I'm nervous.
6) From nervouness
7) When I'm nervous.
8) To be flirty.
9) When I'm scared
10) Whenever I tell a lie.
11) When I feel like something isn't quite right.
12) When I feel nervous about something.
13) It's a habit I have when I get nervous/scared
14) Nervous
15) Just from being nervous
16) I don't know, I just do it randomly. Especially when I'm scared of something.
17) It calms me down when I'm scared/nervours/anxious/shy.
18) I bite my lip when I get excited about something, it keeps my excitment inside so I don't start jumping up and down.
19) When I'm nervous.
20) Just being nervous.
21) When my ADHD kicks in and I'm trying to listen I bite my lower lip.
22) Whenever my lips are chapped, I bite my lip and pull off skin a lot which gets me sctraches. It's a bad habit I know.
23) I bite my lip whenever I'm scared of something, like my fear of dolls....
24) I bite my lip when I get excited/nervous.
25) It just happens.
Now for the boys (they all gave the same answers in different words so I won't give all 25 I'll just tell you what they all said) and that was when they're nervous and excited.
So the truth is, it's not very often that people bite their lips when they want to be flirty, that's just a sterotype. ;-)
No it doesn't mean you have mental problems I bite my lips sometimes but i have no sign of mental problems ocasionally people bite there lips because they are usually nervous or scared. Mabye, though, if you bite them to make them bleed constantly.
yes
Everybody bites their lip.
When your talking they will look at your lips or they will lick their lips or bite their lower lip.
sometimes we bite our lips because we are nurvous about something or it becomes a bad habbit so if you see a boy biting there lip and there staring at you that could mean he likes you
They're hungry.
You are probably biting your cheeks and lips from stress, like some people bite their nails. Try chewing sugar free gum or eating hard candy instead.
by erotically grabbing their hips and bringing them close to you perky lips, then in a swooping motion ferociously lock lips with his neck
Gently bite her lips and when finishing kiss her forehead
Usually lips are pierced with a 16g.
Wink at eachother, bite your lips, and play with your hair c;
This may look weird while you are doing it, but if you bite your lips and lick them they will look naturally red for a little while at least.