There is ko particular reason of endometriosis. It's  a back flow of blood during menstruation. There are so many reasons.

Main cause is retrograde periods flow

Intimacy isn't adventure sports just concentrate on safe n hygienic practices till ur reproductive goals accomplishment. Latter u can consider (hopefully u mastered art by learning from Kamasutra else u have opportunity to go through classically and authentically)

Emdometriosis develop due to implantation of baby apart from inside uterus...due to vata prakop (due to excess sexual.intercourse) the implantation in proper position can get affected

It is not true but myth.

Both the points you mentioned have a role in increasing the Vata Dosha of the body. Your first point can be answered as a no if diet and lifestyle are correct But having intercourse in abnormal positions can have multiple affects on your body including increased vata dosha. And Vata dosha increase can lead to many diseases including various inflammatory conditions.

Consult ayurveda physician for proper diagnosis and root cause of ailment before consuming any medicine

No... Its not true

Take proper knowledge about this first Chat online

Consult with me regarding ur health issues