Please capitalize where necessary: my sex life does not cost me much, i'm very happy about it.
A: My sex life does not cost me much, I'm very happy about it.
Q: 2. and soon the momentum is going to increase.

A: 2. And soon the momentum is going to increase.
Q: cut the thread and pull through remaining sts. sew tight.
A: Cut the thread and pull through remaining sts. Sew tight.
Problem: controls for player-2 inside game.
Can you repeat this sentence, but capitalize it?
Answer: Controls for player-2 inside game.
Text: bohemien carafe with glass, 19th century.

Correct capitalization: Bohemien carafe with glass, 19th century.
Text: use comma to separate multi-quantities

Correct capitalization:
Use comma to separate multi-quantities