Is it normal i like to sniff my boyfriends clothes?

Okay well, I love my boyfriend to absolute bits and I generally dont have a habit of going about and sniffing things but whenever hes not with me and I miss him and the clossest thing to being with him is either when I hug into my teddy which he got me or sniffing the hoodies hes left at mines, I know this may sound weird but honestly its like a comfort to me (: does anyone else do this though?