If one person is penetrated by two objects, it is generically called double penetration sometimes abbreviated dp.
Oral sex itself can never result in pregnancy.
Sexual intercourse in humans
The penetrating partner's hands usually have to be placed on the receiving partner's back to keep from falling forward.
Description: While group sex does not imply that all participants must be in sexual contact with all others simultaneously, some positions are only possible with three or more people. The receiving partner straddles them, also keeping their feet on the floor.