What would be the best way to get a girl to show me her tits?

go to a strip club

Of course it's normal to want to see tits. However, if your goal is to be rewarded with tits by following some secret formula, you're doing it wrong.

Ask her nicely failing that get her drunk

Stop being an asshole.

Get a girlfriend! She'll show her tits frequently for free! But it's hard to get in a stable relationship, so that's only if you're good at such things.

Just treat women as human beings and show them respect, then perhaps at some point one you won't need to ask such questions.

Some people don't think nudity is a big deal. Others think it is a sin. Showing off a great set of tits is a man's ideal woman.

Money

1 rob a gun
2 rob a store with the gun
3 use money for a prostitute
4 rob prostitute at gun point and sell to sex slave traffickers
5 get another prostitute
repeats steps 4 and 5 for as many non-mutual tits you want

Show her you dick.

chatroulette

Either get a girlfriend or go to a strip club.

Tell her there's a spider on her top

Hang out a car window as you drive by a girl and shout "show us yer tits".

Works every time.

Yes it's normal and it really depends on the girls.
Honestly having a female friend as your wingman, who'll introduce you to her friends and encourage them to have fun is very effective.

Another thing honestly is just be confident, and bold. I met avgirl at my school cafeteria about a month ago at dinner. First time I ever talked to her, I flirted with her and 4 hours later she was laying on my bed playing with herself while I sucked her nipples, be cocky and go for it.

Do you have badoo or tinder available? Make a fake female profile, I swear the lesbians are worse than men and are pure predators!! They'll contact you and be flashing EVERYTHING within 5 minutes.

Pull out a gun.