Problem: We see a lady look out at the snow. we

Answer: then see her shoveling the snow.

Problem: How to improve sexual stamina
Take it slow.
Sex doesn't have to be fast and furious. Keep your movements slow and steady and let stimulation build gradually.

Answer: Instead of being forceful, tease and titillate your partner by holding back and varying the angle, speed and deepness of penetration. When both partners are ready you can speed up together for an explosive finish.

Problem: How to study reactive intermediates
Note that an organic reaction occurs in one of two ways.
The first way is through a concerted reaction that takes place in a single step, with only one transition state. The second way is through a non-concerted reaction, which results in intermediate structures consisting of highly reaction carbon species.
Answer: This is the dominant sort of chemical reaction. Observe organic reactions using a special spectroscopic technique.