First of all I like to think that nothing you do with your body is 'weird'. If taking pictures of you naked makes you feel good about yourself, go for it! If bathing in a tub of mustard makes you feel good - for god's sake go out and stock up your mustard supplies. No one here or anywhere has the right to tell you whether something you do with your body is 'weird' or not. It's your body, it's your decision. Personally, I think taking flattering pictures of yourself is always a great idea, and it really doesn't matter how many clothes you're wearing. What makes you happy is no one else's business, so yes, go and take as many pictures of you naked as you want :)
I couldn't agree with cmbrbatch more! It's your life, do whatever it is that makes you feel happy! Nobody has to know about it if you think it's weird, but what constitutes weird anyway? It's the things that we don't do ourselves that make us think it's weird, that's all.
I think its normal to do that but be careful with them. I think you should download an app to lock you pictures on. I use "keep safe" from google play. It locks certain picture up for me with a password. Just make sure your password isn't the same has your lock screen password! I just don't want something happen and it end in people seeing your photos. Hope I could help!