Hello . I'm 15 And My Boyfriend Is 18 We

Hello . I'm 15 and my boyfriend is 18 we recently had sex. He took a shower and looked at his penis and said it didn't look right I asked him if it hurts and he said no . It's more like a little warmth . I looked at it and it is red . It also looks like little bumps but not a lot . I'm very confused .