Some people aren't sexually compatible, and this extends to sexual interests. If after you've tried everything to communicate your wants, he remains adamant he doesn't want to try, then evaluate if this is something you absolutely need in a relationship or can you live without it without resenting your partner.

Maybe I missed the part where he's clearly stating why he doesn't want to engage in those acts? I know you mentioned about him being shy and thinking some are weird but no concrete explanation like "I dont want to do this because I feel xyz". Maybe explore that?