6. THE COLOUR
Let it [the se-men] out and look at the color, white means he has eja-culated within the past 3 days, yellow means he hasn’t. (Some people say the color will change after time too time, you can check yourself.)
5. DEEP SLEEP
Whenever your girlfriend returns from an unknown place and spend an awfully long time in the bathroom, then something is fishy. Women are always very conscious and would do everything they could to cover their tracks after sleeping with someone else other than their boyfriends.
And to make matters worse, they go into a deep sleep without being drunk. Definitely, they have some serious explanations to make.