This isn't good.
Laptop computers lower sperm counts and increase infertility risk for men
All I do is sit at home on my couch in my boxers with my laptop settled firmly in my lap. Guess I should change that.
The original research publication:
Increase in scrotal temperature in laptop computer users
One of the important and interesting findings: the right one gets warmer than the left one. "In our study, median left and right side scrotal temperature increase in the group with working LC was 2.6°C and 2.8°C, respectively."