Makes laptop sterile on the belly?
Yes, of course.
Yes, it takes the partner's place.
Rather, if you cut the eggs.
There's already a study:
"A wireless internet-connected laptop decreased motility and induced DNA fragmentation by a nonthermal effect. We speculate that keeping a laptop connected wirelessly to the internet on the lap near the testes may result in decreased male fertility." https://pubmed.ncbi.nlm.nih.gov/22112647/
https://www.diagnose-funk.org/publikationen/artikel/detail?newsid=688
https://faktencheck-mobilfunkstrahlung.de/wp-content/uploads/2019/03/umg_Beilage_Review_WLAN_Wilke_End_180129_Druckfreigabe.pdf