Eye contact, Women indicate interest to men with eye contact, AND women make the first indicator of interest. (via eye contact)
You're going to have to look at him and hold eye contact for about 3-5 sec about three times before us guys can get a clue.
That's a pretty annoying irony for a girl with ASD. Or a guy with ASD for that matter.
After you do the eye contact thing the rest is up to the guy (theoretically) but it may help if you realize that guys go pretty brain-dead around attractive women (and virtually all women are attractive, trust me) so if you felt like it you could go play fun little flirting games with them, watch them get all flustered and get some practice in to nail down the guy you'd like to try out.
Oh yeah, cleavage is the Coup de grâce for ending all male mental resistance.
It doesn't have to be big, it doesn't have to be deep, it just has to be 'visible'.
Even an A cup girl can easily manage to mentally melt a man using a "revealing" top.
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(14.01.b) cogito ergo sum confusus