Okay so what did i do wrong?

last night at my honmecoming my best friend and i were dancing. two of our guy friends were next to us just standing there cause they were too embarassed to dance (they said they dont know how) so i took the hand of one of them and turned my back to him giving him the signal to grind with me. and he did. but only for one song. just normal grinding..nothing slutty. so idk if he enjoyed it or not. :/ do guys like grinding? should i have let him make a move instead of me leading him into it? :(Okay so what did i do wrong?
yeahh guys LOVE grinding...but like you said it could have been that he was embarassed because he didnt know what he was doing .

data into xsds