This is a tricky situation. Physical intimacy is a very important part of romantic relationships. It is an expression of love and trust. That is why it is a huge decision for people. Even if you genuinely love someone, it is daunting to engage in physical intimacy because of the emotional implications.
This means that relationships get strained when people are at different levels of readiness for physical intimacy. The person who is ready may feel that the other person does not love or trust them enough. This can lead to hurt and anger. The person who is not ready may feel that the other person does not respect or care for them genuinely. This can lead to hurt and anger too. The important thing is to talk it out, be open and transparent in communication and see if any compromises can be made. Sometimes it maybe wiser to break up and move on. Your personalities may not be compatible if it is that difficult to be on the same page. It is also remember neither side is wrong. It is not wrong to desire physical intimacy. It is not wrong to wait till you are comfortable.
The tricky part is the demand for intimacy. There is a very fine line between desiring intimacy to take the relationship to the next level and emotionally blackmailing the other person to put out. While some may disagree, I do feel coerced consent constitutes rape. Consent ought to be a very willing autonomous decision. Coerced consent does not have that free will element and hence doesn't count. But I do understand that such things are difficult to prove. Also no consent has a lot more gravity than coerced consent. I also feel that if the coercion is done purely for physical pleasure with no real commitment to the long term relationship then it definitely is rape. Again, I do understand it is not easy to prove.
I think one of the best solution is encouraging understanding and patience as well as giving people the confidence to walk out of situations they are not happy with. If you are feeling pressured to do something you are not ready for, you end the relationship and find someone who is more compatible. Similarly if intimacy is important to you and you don't get it, it is completely fair to walk out and find someone who is more compatible.