Bismihi ta'ala
Yes, these things are permissible, or rather even mustahab, as a form of foreplay. Our religion Islam encourages one to fulfil the sexual needs of the spouse, and not only their sexual needs. This is why foreplay is mustahab.
Of course, as semen is najis, that would be the only concern, to make sure that najasah is not swallowed.
And Allah knows best.