A first date tips for geeks, by JudasMyGuide:
1.) Don't tell her about any children you dreamt up, no really long term plans, your perfect wedding or anything like that.
2.) Don't boast regarding your sexual prowess. Don't mention any fetishes. Yes, two ponytails/The Little Mermaid/spitting/octopi/cups/felching/diapers/etc. is a fetish.
3.) Don't say "I love you" on the first date. Don't try to get into her bed with "I love you" neither.
4.) Whatever you've learnt from any given pick up artist, forget it immediately. Yes, especially the fake arrogance and "slight putdowns".
5.) You may have read somewhere that some girls like it when you're rough and when you strangle them in bed a bit, but don't mention that whatsoever on the first date, for fuck's sake, you idiot!
6.) Don't joke about Roofies or similar topics.
7.) In fact… don't specifically mention you didn't slip anything in her drink when she wasn't looking - they tend to not believe you.
8.) No teeth in your smile. If you absolutely must, check you don't have any food residue there.
9.) If you obsessively collect anything, don't mention it unless you're pretty sure the girl's into it as well.
10.) If you absolutely must talk about porn stars, at least try to pretend you don't know all their names and genres of choice, okay?
11.) Catholic girls aren't easy, they aren't slutty, they don't wear uniforms and yes, asking about the latter gives away the fact you really watch too much porn.
12.) You absolutely must kiss her, not necessarily in the end... but if she's really repulsed, try to recognise that and don't do it. Really. Also, if you see she's really not that into you and you can't bring yourself to do anything like that… don't talk about it. Going all meta is usually not that appreciated (I have once dated a student of literature with whom we spent most of the date discussing the date's tropes and cliches, but I'd say that's not very common, really. Also, it started to annoy me in the end).
13.) Hint: If she starts talking about some other dude, especially in a sexual way, it's not really a date. Well, unless you're putting your ads/answered an ad in the cuckold section by mistake, so you might want to check that one.