There could be a variety of reasons why two people who are usually just friends suddenly become very touchy. It could be that they have developed romantic feelings for each other and are testing the waters to see if the other person feels the same way. It's also possible that they are going through a period of heightened emotional intimacy and physical touch is a natural expression of that closeness. Additionally, alcohol or other substances could be a factor in their sudden touchiness. Ultimately, the specific reasons for their behavior would depend on the individuals and their unique circumstances. **

For mathematics, some good exercise books include "The Art of Problem Solving" series, "Schaum's Outline of College Mathematics," and "The Princeton Review's Math Workout for the SAT." These books offer a variety of problems and exercises to help improve mathematical skills. For German, "Practice Makes Perfect: Complete German Grammar" and "German Made Simple: Learn to Speak and Understand German Quickly and Easily" are popular study books that provide comprehensive grammar explanations and exercises to practice language skills. Additionally, using textbooks like "Studio D" or "Menschen" can also be helpful for learning German at different proficiency levels. **

For mathematics, "The Art of Problem Solving" series is highly recommended for students looking to develop problem-solving skills and deepen their understanding of mathematical concepts. "Kumon Math Workbooks" are also popular for their structured approach to building math skills through practice and repetition. For learning German, "Studio D" is a widely used series that offers comprehensive language learning materials for beginners to advanced learners. "Schaum's Outline of German Grammar" is also a helpful resource for those looking to focus on grammar and language structure. Additionally, "Living Language German" provides a well-rounded approach to learning German through its course books and online resources. **

It's important to have an open and honest conversation with your partner about your concerns. It's possible that your partner is simply a physically affectionate person and that his behavior with his female friends is platonic. However, if you have specific reasons to believe that he may be gay or if his behavior makes you uncomfortable, it's important to address these concerns with him directly. Communication and understanding are key in any relationship, so it's important to have a candid discussion to gain clarity and ensure that both partners feel comfortable and respected. **

There are many fitness books that are suitable for women, but some popular ones include "Strong Curves: A Woman's Guide to Building a Better Butt and Body" by Bret Contreras and Kellie Davis, "The New Rules of Lifting for Women: Lift Like a Man, Look Like a Goddess" by Lou Schuler and Alwyn Cosgrove, and "Thinner Leaner Stronger: The Simple Science of Building the Ultimate Female Body" by Michael Matthews. These books offer comprehensive workout plans, nutrition advice, and motivation specifically tailored to women's fitness goals. It's important for women to choose a fitness book that aligns with their individual goals and preferences. **

Strength training can still lead to some improvements in muscle strength and endurance, even with unhealthy nutrition. However, the results may not be as significant or sustainable compared to when combined with a balanced and nutritious diet. Unhealthy nutrition can hinder muscle recovery, increase the risk of injury, and limit overall performance during strength training. Therefore, it is important to prioritize a healthy and balanced diet to maximize the benefits of strength training. **

The motivation for strength training can vary from person to person, but some common reasons include improving overall physical health and fitness, increasing muscle mass and strength, enhancing athletic performance, and preventing injury. Strength training can also help with weight management, increase bone density, and improve mental well-being. Additionally, many people find motivation in the sense of accomplishment and progress that comes with reaching new strength and fitness goals. **

It ultimately depends on the boundaries and expectations set within the relationship. Some women may feel uncomfortable with their partner being flirty and touchy with other women, as it can be seen as disrespectful or crossing a line. Communication is key in these situations, as discussing what is acceptable behavior can help ensure both partners feel comfortable and respected in the relationship. **