remember, there is no right or wrong way 2 kissing! that is that! with somethings in kissing u might not like, others will like. u shouldnt tell him or hint to him that his kissing is bad at all , if u do he'll just be afraid 2 kiss u again
you could try saying something like "remember one time when we were kissin back at *insert place/time*" and then tell him how you liked it and what u liked about it
there is no way that guy is gona remember exactly what he was doing..that way he knows how you like it and there is no harm done!!! cool?