Most guys that mess with transman are bisexual bicurious or willing to fuck anything with a hole most straight guys dont see themselves as gay when dealing with a trans man cause some still have a pussy once again it all depends on the person.
Not all trans man have dryness the dryness only come from testosterone some transmen don't take or use testosterone alot of transman like to be penetrated it all depends on the person. I'm a straight trans man that injection testosterone dont do penetrated at all.