Why so many of my peers (16m) are about lust?

So I'm 16 and so many my friends talk about girls- Very often brag or discuss physical stuff and that's a very often topic amongst them. l don't feel such a strong need to get very physical with a girl - yes I AM COMPLETELY STRAIGHT and find my girlfriend attractive! But lust and physical things don't take up as much of my mind compared to my friends - thus they often say I don't have feelings and don't know what love is... S3x and stuff related to it ain't everything.. I just wanna do my chores, schoolwork and but that new dirtbike man...