There are a number of things that happen during intercourse that can leave you a worried man. There is no need to worry about everything. The delay the release of semen during intercourse is a normal experience for men of different ages.
According to Joseph Sonstein, M.D, a urologist with the University of Texas Medical Branch, semen is highly viscous hence it takes some time to flow from one point to another. This is the reason why some of the semen will reach later than expected.
"Semen is just a little more viscous, so it takes more time for gravity to work it out of your urethra," he says.
On the shrinking of the penis when it is exposed to wetness, he argues that it is not the wetness that makes it do so. He opines that the scrotum hangs outside hence exposes itself to the water or cool air outside there.
When the weather is cold, there is the shrinkage of the scrotum thus making your penis to become smaller in the process. If your penis has been shrinking whenever it is subjected to cold weather then there is no reason to raise alarm over the same since it is normal.