Is placing something round in the anus to satisfy desire, in order to avoid committing sodomy with a bad companion, considered sodomy?

Praise be to Allah, who has protected you from committing the abomination of sodomy.

Placing objects in the anus is forbidden because it is a gateway to indecency and a means of seeking pleasure in what Allah has not permitted, as Allah Almighty says: "And those who guard their private parts, except from their wives or those their right hands possess, for indeed, they will not be blamed - But whoever seeks beyond that, then those are the transgressors."

You must abandon this act, regret it, and resolve not to return to it. Hasten to complete your marriage to a righteous woman to protect yourself. If you are unable to, then you must fast, as the Prophet (peace and blessings be upon him) said: "O young men, whoever among you can afford to marry, let him do so, for it helps lower the gaze and guard one's chastity. And whoever cannot afford it, let him fast, for it will be a shield for him."

Cut off ties with bad company and replace them with righteous companions. Seek knowledge with them and worship Allah. Persevere in the remembrance of Allah, especially the prescribed invocations. Maintain your ablution, and supplicate to Allah to grant you chastity and make unlawful things hateful to you.