If it's an actual demon of lust then it's not really contagious, unless he let the thing in - in which case some kind of exorcism is needed. If it's just some sex-adjacent elemental spirit then it really depends how you like to govern your inner world. I would get rid of it by invoking an opposite current of power.
Could he let it in without trying to?
Possible, to a degree. One can agree to things without knowing their consequences. Sometimes spirits exploit vulneralibilities created years before. Depends on what kind of spirit we're speaking about. What symptoms does your friend notice?
He's noticed a new desire to have sex as a way to conquer or take from others, after sleeping with the girl he looked her in the eyes and felt like a primal fear as if she was demonic. It's worth noting that they were both virgins and the sex was unprotected, it also happened on the 6/7th of August which was fairly significant since it was just before the eclipse. The girl was into witchcraft also. He deeply feels that the girl looked possessed and felt intense dread when looking at her eyes. He says that everything was going well for a few hours after the sex.
No way for me to be certain, but from what you're saying it does sound like she left something lodged in him. I can probably compose some ritual for that if you'd like, but honestly it can only serve as an aid for resolving the ethical issue at hand. Either he will follow those desires, which would complete the possession, or he makes the clear, honest choice to oppose them. Acts of soverign will are quite crucial in such cases, all the other magical practices are mostly to help get you to that point and clean up whatever residue is left after.
If you wouldn't mind composing a ritual he'd really appricate it.
I am the guy that’s talked about in this thread I also have a charged object which I need to dispose of that in a way that does not do a ritual the charged object is panties that she wore when I had sex with her and after she left i kept it and used it to pleasure myself didn’t really consider spirituality at all and I think it’s very charged because of this
