Is it normal that he seems to like my sweat

So we've not been together that long, 5 months now. There are loads of little things he does that, well confuse me. Ok so first of all, I can get quite sweaty hands sometimes and when we're holding hands and I feel like they're getting a bit sweaty I let go and wipe it off, he's started telling me off for doing that (nicely) and saying I should wipe my sweat on him because he wants to absorb it. He licks and kisses my palms and he also said if there was a bottle of my sweat he would drink it. Now I think that's sort of weird but maybe he was just trying to make me feel less self concious about my sweaty hands (in his own little weird way) and maybe he's just trying to tell me he really likes me and nothing could turn him off me. I can live with that. But there's other things he does too- He sometimes licks my armpits even when I try to push him off, he kisses and licks my feet and inbetween my toes, once again I do try to push him off as I think that's a bit much? I DID ask him if he had a foot fetish and he said he's never been interested in any other girls feet, he just likes my feet. I catch him licking and sniffing my worn underwear a lot and once when we were getting ready for bed, it was dark and he took my Converse off, I don't think he realised I could see him and he was sniffing the inside of my Converse. I think he sniffed my trainers again a different time when I was in the toilet. AND he has asked me if maybe once I not shower after I go to the gym before I see him. Any input? Is this disgusting or does he just really like me a bit too much lol?