All of these are top-level comments.

Drop an earing to get a whiff of some penis.

EDIT: Cheers for the gold. I'm a bloke btw. [ 1987]

Not a woman, but...100% success rate [ 1395]

Saying "I'm cold." And then violently fisting her own ass. [ 1163]

One time a girl was trying to remove a piece of food from my cheek... [ 1028]

Ah, that must be the "yawn and lean". You're sitting beside one another, and the girl leans her head on the guys shoulder/chest as if she's tired. Snuggle guarantee! [ 934] (posting history shows they're a man)

So far, I've learned two things from this thread: Incidental contact from a woman may indicate that she is flirting/interested with you and some women are coming up with creative ways to surreptitiously "whiff" your penis. [ 553]

TIL I'm oblivious. [ 549]

Was at a night club once and this cute girl straight up pointed at me and then at her lips. So yeah, we made out.

Subtle? Nope. Classy? Not at all.

Effective? You bet your ass. [ 540]

It's got to be the "laugh then touch guys" move. Like "oh stop it. you're so funny" boom hand on the thigh. [ 510] (posting history shows they're a man)

ITT: Things women never do to me. This makes me sad. :( [ 425]

As someone with a first date with a new girl coming up soon, this topic is a godsend.

Edit: I will also be sure to spend extra time washing my penis that morning. My god, ladies [ 342]

The 'accidental' hand bump to get you to hold her hand. You will notice that her hand hovers right next to yours. [ 183] (posting history yadda yadda)

Now someone is gonna make body contact and immediately think she is in love with him and then complain about friend zoning when it doesn't pan out.

FUCK. [ 160]

I was on a date with a girl, we were watching Les Miserables in theaters, and she kept leaning to talk about how boring the movie was, then she would give my cheek butterfly kisses... im not proud to say but it took at least her 5 times of repeating this for me to get that she wanted to escalate the situation.... i was more upset that i couldn't pay attention to the movie when she was talking though.. [ 121]

Stretch to put your leg around him? [ 89] (post history)

thinking it and expecting them to read your mind and do it instead [ 90]

when sitting beside you and her knee rests against yours and she doesn't move it away. Then there's always the "it's freezing and i conveniently don't have a jacket. may I borrow yours?" Tip: its better if you offer her your hoodie/jacket before she has to ask you because you've been oblivious for that long. [ 78]

With countless experience in the "i see you as a good friend" department, i can confirm that unless you're actually in a relationship or on a date, most of these have a high chance of being general reactions with no sign of anything else.

Where's my vodka. [ 56]

The one thing I have noticed is that slightly cocked eyebrow. [ 50]

So, out of the first 38 top-level replies, 19 of them are from men. Exactly half.

More proof that, when someone directs a question towards women, male redditors see it as an opportunity to talk over them.