Anus don,t have natural lubrication
like a vagina, thus during anal penetration, you should use proper lubrication
otherwise friction due to penetration damage anal tissues causing pain and
Deep anal penetration can cause diseases, thus deep anal penetration should be performed carefully otherwise the damage of tissues inside anus cause bleeding which can lead to the transfer of sexual diseases and infection between mature porn escorts or partners.
The anus has bacteria, anal penetration have a high chance of infection as the anus is the area from where body waste gets out and it has a high amount of bacteria which can cause infections and STDs.