I do not believe the “Full Bikini” would include the buttocks and/or butt crack, however you can certainly have those areas lasered. I have and I’m very happy with the results so far. Especially my butt crack or perianal area; I feel so much cleaner and smooth to boot.
If you are interested in having your penis shaft and/or “everything” as you mentioned lasered, I’m pretty sure that would be considered a Brazilian. I’ve had a modified Brazilian, in that my sessions target my scrotum and shaft, but I’m leaving a bush at the base of my abs where they meet my dick.
As far as being naked goes, the first time I went in to have my ass done, I was nervous and my tech nonchalantly asked me to remove everything so we could get started. She didn’t seem bothered, so I striped and laid face down on the bed. That was baring my ass, so it wasn’t that big of a deal, except when she really got up close and personal with my crack. The next visit when it came time for my first Brazilian, I was anxious about exposing myself and becoming erect during the session. I decided I simply had to take the plunge, so when the time came I striped down to my birthday suit and reclined on the bed face up. I was already a little erect, but I couldn’t really do anything about it. She didn’t bat an eye and got to work. I really started to get erect when she worked on my scrotum, and by the time she got to my shaft I had a full on erection. I asked her if my hard-on was a problem and she said that actually it was perfect and she was able to gain better access with a little help from me. Since then, I don’t worry about being naked or having an erection during my sessions; my tech is very professional, so it is a non-issue for me.
If you and your wife like the look and feel of you being shaved, I believe you’ll both love the look and feel of you being lasered. Just be sure to do it because YOU want to, because after all of your sessions are done, it won’t grow back. You will want to ask the laser center if they do male Brazilians; it’s as simple as that and nothing to be embarrassed about. I’m sure they get the question often and will have a quick answer. If they do male Brazilians, they will laser whatever parts of your junk you want to laser, your balls, your shaft, your bush, any combination, or literally EVERYTHING.
Good luck!