As simple as men claim to be, they are total mysteries to women sometimes. If you've been disappointed by an unreturned post-date text (we've all been there), or have wondered if your phone is broken because you haven't received his calls, this is for you.

In a Reddit post, men revealed the things that must happen on a first date to get them to ask you out for a second. Next time you're going on a date with someone you're really interested in, see if these signs are there - they'll indicate if he will ask you out again.

1. You had flow

"What it really comes down to is how natural the conversation is."

In "She's the Man," Amanda Bynes' character teaches Channing Tatum how to talk to his crush. She says it doesn't matter what they are talking about as long as the conversation flows. Flow is flow, even if you're talking about cheese.

2. He's attracted to your humor and your face

"If they make me laugh and I'm attracted to them; I'm definitely interested in a second date."

Looks aren't everything, but they are definitely something. If you're just not his type and can't make him laugh, chances are he won't take a second chance on you.

3. The date flies by too fast

"The feeling at the end of I would really rather just keep talking/hanging out."

It's best when the date ends because one of you has plans, not just because it feels like it's time to end. When you're getting the stink-eye from the waitress because the restaurant is closing and neither of you want to finish up the conversation, that's a good sign.

4. Thinking of you after the date makes him smile

"I think of her often afterward and smile every time."

A great date makes you unforgettable. If a few days have passed and you haven't crossed his mind once, to him it's a sign a second date shouldn't happen.

5. You pleasantly surprised him

"I walk away from it feeling as or more excited than I did going into it, that's enough for me to want to set up a second date."

There are a lot of expectations to live up to with that anticipated first date. If you keep his excitement up even after the date ends, he'll want to take a second chance and see you again.

6. You dished out just enough seriousness

"I always like when the conversation can flow between serious and making each other laugh."

Dumping all your emotional baggage and family drama on him in the first date tends to spook him away. Keep things sincere and put your personality out there, but keep the heaviest conversations at bay until you get to know each other better.

7. You showed genuine interest

"The best first date I've ever had the girl let me know she was having a great time by taking my hand and just holding it. The way she looked at me made me feel ... special."

If you're interested, show it! Don't spend your time figuring out how to reel a man in, just sincerely listen to him and let him know you like being around him (if that's how you feel, of course).

8. You wanted to learn about him (not just brag about yourself)

"I have had a [date with a] girl that would keep going on and on. She talked for a good 2 and half hours."

He wants to hear about your interests, but people enjoy a good listener as well. If you want a second date, ask him about his interests and life more than you talk about yours.