Lately i have been following my friends advice as he gets laid on a daily basis. It'sd as though his game is 100%. He got it amazing socially hes like a footballer.
Anyway, one thing he does have is have a six pack, i don't yet but working on it. Girls do like them, it must be the thing that if you have one, you are athletic, and not everyone has one so shows that you are strong and look after yourself.
What he does is chat to girls etc... being flirty, then talks about them naked, iv been doing the same, and i'l be like... hmmm i wouldn't mind seeing you with no clothes on etc... or when we are texting say, send a dirty picture, u gotta get her in a good mood, and a happy mood first so she will take it as a joke...
some girls are easy and if they are in love with you, will send a dirty picture. if not they will say, umm no..... u send me one
then start with the whole... hmm maybe what do i get in return? 
tease her a bit.Strip off to your underwear and take one, use photoshop to tone it up etc.... looks good and send her it with a message like, for your eyes only...
Anyway, she will like it, and iv noticed that the girl i jjust did it to after that was like, o well you can see me in person naked
larlarlarlar and with her i also used the.... i'l send you one, but now you owe me.... a kiss, and you naked.next time i saw her, as she had a taster of me in my underwear, she had it in her mind i was hers, then she kissed me etc.... i did get this a bit wrong and was too forward, i shudda made her work for me to get naked more, but i just got naked and let her have me.
ps... if a girl gets pissed off by it. say its a song xD or include the song into the conversation. I'v done it on 3 girls latly, they love it.