I don't see that much problem here. Just compare it to a Kalachakra initiation:"The three exalted initiations are as follows: the vase initiation is the gnosis of bliss and emptiness that arises from the disciple touching the consort's breasts. The secret initiation is the gnosis of bliss and emptiness that arises from the disciple savouring the bodhichitta
(sperm), the wisdom-gnosis initiation is the experience of connate joy that arises from the disciple and consort themselves engaging in union."
"While teachers of the middle way, mind only, transcendent wisdom, mantra, and other schools may have their own assertions, the fulfillment of those intentions is the same. There is not a single thing that is not contained within mind."
(Gampopa to Düsum Khyenpa, in "The First Karmapa", KTD Pub, p254)
“If you recognize the world of appearance and existence as the mind, realize the mind itself as empty, and have no grasping at the superiority of your realizations — this is the ultimate view."
(Chegom Dzongpa, in "The Book of Kadam", Wisdom Pub, p609)