cologne

So, I've been dating my boyfriend for about a month and I didn't really notice this. He doesn't use cologne or Axe or anything... he showers and that's it. I love guys that smell good. That's very important to me but idk how to tell my boyfriend without hurting his feelings. No. He doesn't stink lol I just love when guys smell delicious lol how can I tell him?!? What can I tell him to convince him to use cologne ? Lol please help me !