My boyfriend and masturbating

So my boyfriend openly watches porn . Meaning we have talked about it and he's admitted that he does . Awhile back we were just talking and I asked him if he would feel uncomfortable if I send him videos of me fingering myself . He knew that I was asking I'm just a hypothetical way. Anyhow he told me that he wouldn't like it and would feel uncomfortable. I'm confused because he has admitted that girls have sent him videos like that , that he got off to and that he also watches porn . How am I any different if we are sexually active and if I send him full nudes. ?