My boyfriend keeps asking for pictures?

my boyfriend and I have been dating for little over a week and he keeps pestering me for pictures..I asked him why and he said because he wants to see me...so I've sent him one twice. (different one each time) but its getting annoying and I just want to know why hes doing it? hes asked me for s before aswell but I said I wasnt gonna send any. and last time I sent him a picture of my upper body he replied with woha b.one.r...and it was an innocent photo...why does he want these photos? :S