The Testicle
Scholars have said that seeing a testicle in a dream has specific connotations; if one sees their testicle removed, it indicates the death of their child and the cessation of their offspring thereafter. However, if one sees themselves willingly giving their testicle to another, it may signify the birth of an illegitimate child who will be attributed to someone else.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam
Note: These are traditional scholarly interpretations (ijtihad) drawn from a specific classical source — not a binding religious ruling, fortune-telling, or a prediction of the future.