In reply and as only of many in the community who will probably provide his/her thoughts, here are mine:

1.) Not generally, especially with people who have no prior sexual experience and who have no communicable diseases.

2.) Semen and vaginal mucus are acquired tastes. Even though urine is generally pure, the two reasons for precum are a) to purge the urethra of impurities harmful to sperm, and, b) to act as a temporary lubricant while on the Glans.

Semen contains about seven calories, comprised mainly of sugars. There is no harm in swallowing your own or someone else's if the person is healthy. Some women do not want their partner to ejaculate in their mouth, and, of those who do not mind, some choose not to swallow. The semen can then be spit out into a tissue or towel. Women who swallow the solution can either do it alone or with the aid of a sip of water, cola, or other drink, both to help it go down and to mask the taste and consistency.

It is a woman's choice whether to swallow or not and her partner must accept her decision.

3.) Like masturbating, how often you do it (as well as how long you spend doing it) only becomes a problem when the time involved interferes with other daily tasks, obligations, or chores. Then, of course, is the boredom factor of simply doing it too much over a span of time. What may seem like a great use of time on Friday evening may seem like a bad idea on Sunday afternoon! if much of your free time is spent only making love. Making love becomes a balancing act between doing it regularly and perhaps frequently and over doing it to the point where you do not want to do it for several days. Better me thinks to spread it out, "get a life", and do other things with your time in order to have sex fewer times during the day and more often during the week.

In a new relationship, a couple may make love one or more times a day, perhaps ever day or two. As a relationship matures and ages, frequency goes down to several times a week to a few times a month. In a relationship in which there are children, that number can become even less due to simply being tired. Making love whether it includes sex or not, must be managed like each of your other daily or weekly tasks. In other words, make room for it!

Couples in a new relationship tend to make love more often than those for whom it has become old hat. Frequency is dependent upon several factors. Among them are interest, sex drive, the need to demonstrate the love each has for the other, a need for closeness, and the release of stress and sexual tension. How often also depends upon how orgasms are dispensed. A session in which the guy has multiple orgasms will inevitably reduce the number of total climaxes he can experience in a day. Although the number of climaxes a guy can muster is dependent upon age and drive, the average male can muster a maximum of four with three being typical. The question now becomes, how do you want to enjoy them with her? Do you want three each with a climax? Do you want two, each with one or two? Do you want a single love making session in which you enjoy a multiple string of three, inter-disbursed with several of hers?

4.) Your respective weights of 170 lbs. and 106 lbs. are common. Regardless of the weights involved, and the need to adjust for comfort and any physical conditions is the fact that we have hands, elbows, and forearms to rest upon when using the Missionary or Woman Superior positions to name two. If you are on top for example and want to lay upon her, do so but do not smother her with your full body weight. Transfer a major portion to your arms so she can experience you without being crushed. On the other hand, if she is on top and wants to rest upon you, you can no doubt handle her entire weight with ease.

Height will probably only be a problem between a couple in which one is very tall and the other is very short. In these cases, the couple will just have to experiment and test out various positions to find those that are workable.

5.) Read through the following informational posts listed here:

Study and apply the information so that both of you can become better, more skillful, more knowledgeable, lovers.

If you are both healthy and free of disease, there are no ill effects of oral sex. Most women find the taste and consistency of semen in their mouths to be not nice. That takes some getting used to but I recommend that women learn the skills and they will become tolerant of the flavor.

All couples reach their own pace with respect to frequency. At the beginning, it is more frequent and daily is not unheard of. Two or three times a week seems to be a common pattern for folks your age.

A wonderful book to learn lost of good ideas is The Joy of Sex. It collects ideas from all cultures and gives more ideas than you will able to use in a lifetime. There is truly something for everyone from beginners to well experienced sexual partners.

We all make our own rules and the fact that you discuss these issues makes it very likely that you will find common and satisfying activities. For both of you, but especially for her, do not have great expectations for a while until you learn these parts of your body that have never been used.