For the lagnas,Midhuna and kanya,Guru is a malefic(Papi).Guru owns two kendras.
When a natural benefic owns a kendra,his natural benefic charater reverses.
So,he becomes bad for both lagnas.
Though Guru is in own house in 7th house kendra,it gives rise to Maha Yoga.
When a male belongs to either of these two lagnas(and have Guru in 7th house,
he is facing marital problems.
Wife may come from a rich family,with high status.She may be earning fat salary,
in such cases.For outsiders,everything seems nice.But they are facing marital
Sage Parasara says,Guru is a papi(malefic) for these two lagnas.Maha yogas
caused by papis(malefics to that lagna)showing some defects. firstname.lastname@example.org