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."
"If the Buddha-Nature is seen, there will be no seeing of a nature in any thing."
(Nirvana Sutra, T12n374p521b3; tr Yamamoto)
"Neither cultivation nor seated meditation — this is the pure Chan of Tathagata."
(Mazu Daoyi, X1321p3b23; tr. Jinhua Jia)
“Don’t rashly seek the true Buddha;
True Buddha can’t be found.
Does marvelous nature and spirit
Need tempering or refinement?
Mind is this mind carefree;
This face, the face at birth."
(Nanyue Mingzan: Enjoying the Way, tr. Jeff Shore; T2076p461b24-26)