The penis in the vagina is equal to the vagina! Thus, the only choice of pleasure without concern remains an anal sex. But in our minds there is still a question that has not yet been answered.
How safe is we not getting pregnant through anal sex?
Okay, technically there are not many chances. Anus does not relate to reproductive organs, so direct you can not do a bebush by doing anal sex. At the same time, never say never. The vagina and the anus channels are close to each other, so it can happen that sperm slides inside the vagina.
However, it is very rare to get pregnant by anal sex, but if you use this way as "to be saved" from an unwanted pregnancy you are not 100% safe. Even sex experts recommend that the use of protective measures is necessary to prevent any possible infection, especially where the microbes are even more numerous.