My Girlfriend did not like the taste of my semen

Just last night my girlfriend gave me a blowjob and did not like the taste of it. She said it tasted salty and was really sticky. I asked for a brief description of what it tasted like and she said salt water (like in the ocean). This was my first time getting one and I didn't think it would taste bad or be sticky. I did not shower beforehand and usually when I masturbate I don't clean it really good. Could that be why? I don't diet and I eat a lot of crappy foods like chips and candy but I also eat lot of protein and fruits and veggies with my dinner every single day. I read that if you eat more fruits and vegetables it would taste sweeter. I think it was sticky and tasted salty because of the sweat that I put on all day and also because I masturbated that morning and didn't clean it that well. Could that be why? Is there anyway I can make sure that she will like the taste? What can I do to make it taste better? Is this natural or can I get rid of the bad taste? Anything information about this or past experience helps! (BTW she said it didn't have any oddur at all so I don't think I have an infection and when I masturbate its not that sticky)